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Daily Work Organizer. Put your HW next to your DWO. Remember to pick up your graded work from the box! . Homework : Finish Cornell Notes. Readers Theatre Excerpt from: The secret to raising smart kids. Read the paragraph out loud together Read every other line and switch

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Daily Work Organizer

  • Put your HW next to your DWO. Remember to pick up your graded work from the box!

Homework:

Finish Cornell Notes


Readers theatre excerpt from the secret to raising smart kids
Readers TheatreExcerpt from: The secret to raising smart kids

  • Read the paragraph out loud together

  • Read every other line and switch

    • (partner 1 will read the first line, and partner 2 will read the second)

  • When you get to the end of the paragraph, start again! Try using funny accents!



Light speed
Light Speed

  • light around the earth

  • 300,000,000 m/s

  • 3 x 108m/s


Light speed1
Light Speed

  • Just over a second from the moon


Light speed2
Light Speed

  • 8 minutes from the sun


Light speed3
Light Speed

  • 4.2 years from Alpha Centauri! (second nearest star)


Lightyear
Lightyear

How far light travels in 1 year

  • 170, 000 lightyears away

  • How many years ago did it occur?


Refraction
Refraction

  • the bending of light when passing through a new (transparent) substance


Plane mirrors the flat mirrors
Plane Mirrors: The Flat Mirrors


Plane mirrors
Plane Mirrors

  • Incident ray hits the mirror

  • Reflected ray is the ray that bounces off

  • The Normal is the perpendicular line from mirror


Parallax
Parallax

real screw (behind mirror)

  • Parallax can be used to find image location

  • Parallax makes objects appear to move when not in the same place

  • Try it

mirror

image of screw



Parallax2
Parallax

  • Move head to the side

  • If the image and real screw separate, then not at same place

  • Try it

mirror


Parallax3
Parallax

  • If the two move together, they are at same place

  • Try it

mirror



Remember to pick up your graded work from the box
Remember to pick up your graded work from the box!


Now to the lab

Now, to the Lab

Part I (pg 6)


Daily Work Organizer

  • Draw, measure, and label the: Normal, Incident & reflective angles.

  • Bonus: How could you calculate the Incident & Reflective angles without drawing anything?

Homework:

Finish Cornell Notes

Reading Log for pg23


Homework problems pg 14 17
Homework problems: pg 14-17

Due on Wednesday/Thursday

Every Scholar: Problems 1, 2, 3

Honors physics: above problems plus 4

Due Friday

Every Scholar: Problems 6, 7, 10

Honors physics: above problems plus 8, 9

Extra Credit:

problem 5& any Honors problems


Lab 1 pg 6 11 due t oday by 3 45pm to room 308
Lab 1 (pg 6-11)Due Today by 3:45pm to room 308

Also: Several scholars forgot to write their names on their labs...

TURN IN DAILY WORK ORGANIZERS!


Jobs

  • Whiteboard eraser

  • Powerpoint master

  • 2 students to Handback assignments

  • Salary: 1 ticket per day


Challenge problems
Challenge Problems

  • Do Challenge problems when you are done with classwork

  • Excellent chance to review material that will be on the test!

  • Later on it will become an excellent opportunity to review old material that will be on the final

  • Turn in completed worksheets to the folder and receive 3 tickets


Upcoming events
Upcoming events

  • 1st physics problem set due soon!

    Advice:

    • Work with friends

    • Start NOW (Do not wait till last minute)

    • Ask for help!

  • Binder quiz

  • 1st quiz on Friday


Vocab
Vocab

Incidence

Incidence Angle

mirror

The intersection of light with a surface

Intersection

Whenever light strikes a surface, the angle of incidence is equal to the angle of reflection.


Vocab1
Vocab

Reflection

Reflected Angle

mirror

An amount of light, heat or sound that is thrown back

Throwing back, bouncing off,

Both Edward Cullen and Dracula cannot see their reflections in the mirror. How do they style their hair?


Vocab2
Vocab

normal

Normal

mirror

A perpendicular (90°) intersection of a line or surface

Perpendicular, right angle, 90°

The line normal to the mirror is 90° from the mirror. The normal is between the incident and reflected rays.


Reflection
Reflection

Virtual Image of the nose


2 laws of reflection
2 Laws of Reflection

  • i = r

Object distance

Image distance

=

  • di to mirror) =

  • do (to mirror)




What is a summery
What is a summery?

  • INCLUDES ALL MAIN POINTS!

  • A paragraph written in full sentences.

Example: The angle of incidence is equal to the angle of Reflection. The Normal is an imaginary line drawn 90 degrees to the mirror and is an equal number of degrees from both the incident and reflected rays.


Daily Work Organizer

  • When done: Start on Worksheet #2 or #3

Homework:

Problems 1, 2, 3

Honors: + 4



Let s try it

Let’s try it

turn to pg 15


Find the object1
Find the Object

Actual path of light

Image to eye

14.5 cm

Apparent path of light

Object

14.5 cm


Yourself in a mirror
Yourself in a Mirror

  • Minimum height of mirror?


Tip for 4
Tip for #4

  • Work backwards! Where do the rays need to reach to let everything be seen?

Tip for #6

  • In order to focus you camera you must know the distance between the camera and the image


Class points aka tickets for everyone
Class Pointsaka: Tickets for everyone!

  • 100% homework completion

  • Everyone is in their seats, silently doing the Do Now when the bell rings


Vocab3
Vocab

Parallel lines

Parallel

Parallel lines always have the same distance between them

  • Parallel of latitude

  • Never crossing

  • 并行 (?)

Parallel lines will never cross


Black holes
Black Holes

The mass inside a black hole is infinitely large.


Vocab4
Vocab

Infinite

  • 无限

Limitless or endless. Impossible to measure or calculate

Black Holes! Larger than the largest number

The mass inside a black hole is infinitely large.

The number closest to 0 that is not 0 is infinitely small


Vocab5
Vocab

Image

  • Light rays

  • Not always behind a mirror or lens

An optical appearanceproduced by light.

Interesting fact: the image is not always BEHIND the mirror!


Vocab6
Vocab

Object

The physical object that produces an image

  • Examples: ME when I look in the mirror!

When Bella looks into the mirror she is the object. Her reflection is the image.


Reflection lab grades
Reflection Lab Grades

  • Total possible points: 50

  • Examples

    • -2 on the front means you earned 48 / 50 points or 96%

    • -10 on the front means you earned 40 / 50 points or 80%


Common shortfalls
Common Shortfalls =(

  • No Full Sentences

    Ex:

  • Example of a great response:

4.2cm and 4.5 cm. 5%

Whatis 4.2cm???

The distance from the object to the mirror is 7.7cm and the distance from the mirror to the image is 7.6cm. The percent difference is 1.3% which indicates that these distances are very close.


Common shortfalls1
Common Shortfalls =(

  • Not labeling the Image in Part 1

Step 9 of the procedure says: Label the image

  • If you want to discuss lab grades:

    • Write a note. Staple it to the lab and turn it into the re-grade folder

    • Talk to me after school in room 308


Lab corrections
Lab Corrections

  • Due 1 week from the day it was due (MONDAY  Tuesday)

  • Correct your lab and staple a note to the front telling me:

  • what you corrected

  • your original mistake

NOTE: You can not earn points back by labeling the image…


1 st quiz on friday
1st Quiz on Friday!

  • Be prepared!

    What will the quiz cover?

    • Worksheets from class

    • Homework

    • Vocabulary


Daily Work Organizer

Fridays Homework:

Corrections to first problem set

Problems 6, 7, 8

Honors: + 9, 10


Problem 1
Problem 1

What happens to the surface of the road when it is wet?

Water fills in crevices (bumps) creating a smooth surface for light to reflect upon

Why?





Vocab7
Vocab

Image

  • Light rays

  • Not always behind a mirror or lens

An optical appearanceproduced by light.

Interesting fact: the image is not always BEHIND the mirror!


Vocab8
Vocab

Object

The physical object that produces an image

  • Examples: ME when I look in the mirror!

When you look into the mirror you are the object. Your reflection is the image.


Vocab9
Vocab

Converge

Come together from different directions to eventually meet

  • Come together

  • Cross

  • Eventually meet

The students will converge in the cafeteria


Vocab10
Vocab

Diverge

  • Separate

  • Grow apart

  • Turn away

Separate and go in different directions

Monkeys and Humans diverged from a common ancestor


Daily Work Organizer

1.0 m

mirror

Tuesday’s Homework:

Page 24-27

Extra Credit: pg 20

2.0 m


If you did any extra credit problems
If you did any extra credit problems

  • Write your name on the homework

  • Staple your homework

  • Turn it in TODAY


Do now

A man is standing between 2 parallel mirrors looking to the left.

Do Now

How far away from the person are the first three images he sees?

mirror

object

1.0 m

1.0 m

2.0 m

3.0 m

2.0 m


Problem 6
Problem 6 left.

image

object

4.5 m

2.0 m

4.5 m

2.0 m


Problem 7
Problem 7: left.

But what is the question is asking?

θ = incident angle

90° = θ + 25°

normal

90° – 25° = θ

θ

65° = θ

25°

25° with the surface of the mirror… ?


Reflection problem 10
Reflection problem 10 left.

Virtual Image of the nose


Daily Work Organizer left.

Homework:

Read Lab 2 (34-35)

Turn in Activity pgs 24-28

Pre-Lab (honors)



Curved mirror vocab
Curved Mirror left. Vocab

  • C = center of curvature

  • radiusof curvature

  • f = focal point - rays converge

  • F = focal length

  • f= C /2

f

C


Vocab11
Vocab left.

Center of Curvature

  • Center of sphere

Radius of the sphere the mirror was made from

The center of curvature of a 10 meter sphere is 5 meters


Vocab12
Vocab left.

Focal Point

  • Where rays cross

  • “ “ come together

  • “ “ intersect

Point at which rays converge (come together)

f

Every ray crosses the focal point


Do now 4 problems
Do Now: 4 problems left.

  • Where is the center of curvature of a 12 inch basketball?

  • A curved mirror has a center of curvature of 16 cm. What is the focal length?

1. The center of curvature is the center of the basketball = 6 inches radially inwards

2. The focal length is ½ the center of curvature = 8cm


What is the center of curvature of a golden globe award
What is the left. center of curvature of a golden globe award?

(the diameter of the globe is 10 cm)

The center of curvature is the center of the sphere

5 cm


What is the focal length of the death star laser if the radius of the laser dish is 120m
What is the focal length of the death left. star laser if the radius of the laser dish is 120m?

The focal length is ½ the center of curvature

= 60 meters


Homework problems pg 28
Homework problems: left. pg 28

Due on Wednesday/Thursday

Every Scholar:

  • Read Lab 2 (pg 34-35)

  • Activity pages 24 - 28

    Honors physics: Above plus Pre-lab

    Due Friday

    Every Scholar: Lab 2 (pgs 34-37)

    Extra credit mini project on page 20

Extra Credit:

Eye chart mini project pg 20


Jobs left.

  • Whiteboard eraser

  • Powerpoint master

  • 2 students to Handback assignments

  • Salary: 1 ticket per day


Boba binder of brilliant answers
BoBA left. Binder of Brilliant Answers

  • BoBA can be found in room 308

  • Excellent way to check your HW answers

  • Make sure you’re studying the right answers before tests & quizzes


Class goal
Class Goal! left.

85%


Class goal1
Class Goal! left.

80%


QUIZ! left.

1° Class Average: 85%

2° Class Average: 74%

3° Class Average: 65.3%

4° Class Average: 73.8%

6° Class Average: 70.3%


Quiz retakes
Quiz Retakes left.

Friday at lunch, 12:25pm or after school at 3:25pm, Room 308

No late entry permitted

Option 1: Turn in your corrected 1st quiz and receive the higher of your two scores

Option 2: Retake the quiz and receive the average of your two scores


Questions about homework or quizzes
Questions about homework or quizzes? left.

Room 308

Tuesday 3:10

Thursday 3:10


Question 6 2 points
Question 6 (2 points) left.

  • Incident ray hits the mirror

  • Reflected ray is the ray that bounces off

  • The Normal is the perpendicular line from mirror


Question 7 (3 points) left.

Actual path

Object

Apparent path


Activity pg 24 28
Activity left. pg 24-28

  • Due on Wednesday / Thursday

  • Will be graded

  • Ignore /skip question 3 on page 27


Pg 25
Pg left. 25

Your ray diagram should look something like this:


Pg 251
Pg left. 25

  • What is the orientation of the rays after being reflected from the mirrors surface?

The reflected rays diverge.

The rays will never intersect (cross) because they are diverging


Pg 252
Pg left. 25

2. How does the focal length compare to the center of curvature?

The focal length is ½ the center of curvature


Pg 26
Pg left. 26

3. If you had a 10 cm Christmas tree bulb that was 10 cm in diameter, what would it’s focal length be?

The focal length is ½ the center of curvature = 5 cm


Pg 27
Pg left. 27

Your ray diagram should look something like this:


Question 5 pg 28
Question 5, left. pg 28

Draw tangent lines


Do now solve for x
Do Now: Solve for left. x

X = 2

X = 6

X = do + di

X = dodi/ (do+ di)

  • x/6 = 1/3

  • x/8 = 1/2 + 1/4

  • x/(dodi )= 1/do + 1/di

  • 1/x = 1/do+ 1/di


Vocab13
Vocab left.

Real Image

  • Image in front of mirror

  • Only created by concave mirrors

Occur when light rays from an object reflect from a mirror and converge

Movie theatre projectors create real images on the big screen.


Vocab14
Vocab left.

Virtual Image

image

object

2.0 m

2.0 m

Occur when light rays from an object reflect off a mirror and diverge

  • Virtual images are behind the mirror

My reflection in a plane mirror is a virtual imagebecause the reflected rays converge behind the mirror


Lab 2
Lab 2! left.


How do you calculate the focal length of a curved mirror
How do you calculate the focal length of a curved mirror? left.

1/f =1/do +1/di

1/Focal length =

1/object distance + 1/image distance

f = dodi/ (do + di)


Note left.

  • Ignore question 2 on page 37

  • Ignore the bottom row discussing convex mirror data on page 38

    We will talk about convex mirrors in class on Friday


Your data table
Your data table left.

  • Image Size; either larger, smaller, or same.

  • Image Orientation; either upright or inverted.

  • Image Position; either behind mirror (distance will be negative), between mirror and object, at object, or beyond object


Advice
Advice left.

  • Mark & number all 11 object and image distances on your paper

  • Record the object size, orientation & location of each image (skip recording the object and image distances, you can measure those later)


Advice1
Advice left.

Group Roles

  • 1 person measure the object and image distances

  • 1 person calculate the focal point

  • Remaining group members should do part 2 of the lab


f = left. the focal length

C = the center of Curvature

f = C/2

The focal length is ½ of the center of curvature

di= distance from paper to mirror

do = distance from light filament to mirror

  • What is f?

  • What is C?

  • What is the relationship between f and C?

  • What is the image distance?

  • What is the object distance?



Daily Work Organizer left.

Monday’s Homework:

Finish 30-33

Reading log: 39 - 40


Pg 37 convex mirror
Pg left. 37 Convex mirror

Position:

Size: Larger / Smaller / Same

Orientation: Upright / Inverted

Type: Real / Virtual


Convex mirror pg 37
Convex left. mirrorpg 37

Behind the mirror

Position:

Size: Larger / Smaller / Same

Orientation: Upright / Inverted

Type: Real / Virtual

Smaller

Upright

Virtual



Curved mirror vocab1
Curved Mirror left. Vocab

  • C = center of curvature

  • radiusof curvature

  • f = focal point - rays converge

  • F = focal length

  • f= C /2

f

C


Real vs virtual images
Real vs Virtual Images left.

  • Concave Mirror

  • Image in front

  • Image is Real

  • Light rays converge

  • Use a Card


Real vs virtual images1
Real vs. Virtual Images left.

  • Concave Mirror

  • Image behind mirror

  • Image is virtual

  • Appears to converge


Concave mirrors

C left.

f

Concave Mirrors

Incoming Parallel rays reflect:

through the focal point!


Concave mirrors1

C left.

f

Concave Mirrors

Rays through (or from) f reflect:

parallel!


Concave mirrors2

C left.

f

Concave Mirrors

Rays through C reflect:

back through C!


Convex mirrors

C left.

f

Convex Mirrors

Incoming parallel rays reflect:

away from focal point!


Convex mirrors1

C left.

f

Convex Mirrors

Rays towards focal point reflect:

parallel!

Note: Only the red lines are used to locate the image


Convex mirrors2

C left.

f

Convex Mirrors

Rays towards C reflect:

back away from C!



image


Finding the image
Finding the Image left.

  • Draw ray paths

  • Identify Characteristics

  • R = Region

  • S = Size

  • O = Orientation

  • T = Type of Image

Beyond C

larger

inverted

Real


Now go make your own

Now Go Make Your Own! left.

Pages 30-33


Daily Work Organizer left.

Tuesday’s Homework:

Finish 30-33

Problems: 43-44


Homework
Homework left.

Due Tuesday

Every Scholar:

  • Ray Diagrams (p. 30-33)

    Due Wednesday

  • Problems (p. 43 – 47)

    Due Friday

  • Cornell notes

  • Signed progress report

  • Physics text in binder

Extra Credit:


Answers pg 31
Answers left. pg 31

  • R = Region

  • S = Size

  • O = Orientation

  • T = Type of Image


Image characteristics

Image Characteristics left.

Concave and Convex


  • Concave: left.

  • Object at center of Curvature


  • Concave left.

  • Object between C and F


  • Concave left.

  • Object between F and Mirror


Mirror equations
Mirror Equations left.

Solving for f


Mirror equations1
Mirror Equations left.

  • Magnification

  • Really 3 different equations


Mirror equations2
Mirror Equations left.

In front of mirror

Concave mirrors

Convex mirrors

Behind mirror



Find the focal length of the mirror let s go over how to approach word problems

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Find the focal length of the mirror

Let’s go over how to approach word problems…


Solving word problems

Solving Word Problems the prom and is 27 cm in front of the mirror. The image is 65 cm

List your given information

(numbers you can use in eqns)

make sure to label them with a variable

sometimes this includes a picture


A find the focal length of the mirror

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Given:

a. Find the focal length of the mirror

f = ?


Solving word problems1

Solving Word Problems the prom and is 27 cm in front of the mirror. The image is 65 cm

Write out the equation you will use

write it the way you will use it


A find the focal length of the mirror1

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Given:

a. Find the focal length of the mirror

f = ?


Solving word problems2

Solving Word Problems the prom and is 27 cm in front of the mirror. The image is 65 cm

Plug your numbers into the equation

Do not forget your units!


A find the focal length of the mirror2

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Given:

a. Find the focal length of the mirror

f = ?


Solving word problems3

Solving Word Problems the prom and is 27 cm in front of the mirror. The image is 65 cm

Calculate and write your answer!

Box it!


A find the focal length of the mirror3

1.5 the prom and is 27 cm in front of the mirror. The image is 65 cm A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Given:

a. Find the focal length of the mirror


B find the magnification of her image

1.5 the prom and is 27 cm in front of the mirror. The image is 65 cm A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror.

Given:

b. Find the Magnification of her image.


1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size.

Answer:

Image is virtual.

Why? Because image is upright.

a. What type of image is it? Why?


1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size.

Answer:

Mirror is convex.

Why? Because image is smaller and virtual.

b. What type of mirror is it? Why?


1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size.

Given:

c. Find the center of curvature

1st, find di

virtual!

C = ?


1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size.

Given:

Find the center of curvature

solve for f

C = ?


1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size.

Given:

Find the center of curvature

solve for C

C = ?


Given: You see an image of yourself that is upright and half your size.

1.3 A convex mirror has a center of curvature of 68 cm. If the image is located 22 cm from the mirror, where is the object?


Daily Work Organizer You see an image of yourself that is upright and half your size.

W/R Homework:

Finish p. 43-47

Extra Credit:

Honors problems 12, 13, 14


Answers
Answers You see an image of yourself that is upright and half your size.

  • C

  • A

  • C

  • D

  • D


Homework1
Homework You see an image of yourself that is upright and half your size.

Due Wednesday / Thursday

  • Problems (pg. 43 – 47)

  • Honors problems: #12-14

    Due Friday

  • Cornell notes

  • Signed progress report

  • Physics text in binder

Extra Credit:

Honors problems 12, 13, 14

On pg 46


Pg 43 47 each question is worth 3 points
Pg You see an image of yourself that is upright and half your size. 43-47 Each question is worth 3 points…

1 point for writing the given information on the left hand side and an equation you could use to solve the problem

1 point for the correct answer

1 point for a boxed answer

Extra Credit:

Honors problems 12, 13, 14


Cornell notes
Cornell Notes You see an image of yourself that is upright and half your size.

1/3 for completeness

1/3 for notes and questions in margins

1/3 for summaries


Use your ray diagrams on page 30 33 to fill out the table on pg 38
Use your ray diagrams on page You see an image of yourself that is upright and half your size.30-33 to fill out the table on pg. 38


Daily Work Organizer You see an image of yourself that is upright and half your size.

Friday Homework:

Finish all cornell notes

Finish 43-47

Signed Progress Report

PHYSICS TEXT!

Extra Credit:

Honors problems 12, 13, 14


Answers1
Answers You see an image of yourself that is upright and half your size.

  • E

  • A

  • C

  • B

  • E


Vocab15
Vocab You see an image of yourself that is upright and half your size.

+

-

Convex

f

object

  • Outside of a sphere

  • Convex mirrors have negative focal points

  • - f and - C

A surface that curves like theoutside (exterior) of a sphere

Convex mirrors only produce virtual images. The image is always behind the mirror.


Vocab16
Vocab You see an image of yourself that is upright and half your size.

+

-

Concave

f

  • Cave

  • Inside of a sphere

  • + f and + C

object

A surface that curves inwards like theinside of a sphere

If it rains, you could stand under a concave mirror to keep dry. If you stood between the mirror and focal point your image would be virtual.


Concave mirrors3
Concave Mirrors You see an image of yourself that is upright and half your size.

Object beyond C

Object between f and C

Image type:

Image type:

object

object

object

object

f

C

C

C

C

f

Object between f and the mirror

Object at C

Image type:

Image type:

Image

f

f

Image

Image

Image

The focal length is positive for concave mirrors

The Center of curvature is positive

for concavemirrors

+

-

f


Convex mirrors3
Convex Mirrors You see an image of yourself that is upright and half your size.

Object anywhere

Image type:

object

C

C

The focal length is negative for convex mirrors

-

+

Image

f

f

The object distance is always positive because the object cannot go behind the mirror

Convex only produce virtual images


Stations
Stations! You see an image of yourself that is upright and half your size.

Station 8

  • Pink book card

  • Ray diagrams (pg. 30-33)

  • Daily Work Organizer


Corrections to practice problems
Corrections to Practice Problems You see an image of yourself that is upright and half your size.

A.)

di = 22.3 cm

hi = 1.95 cm


Stations1
Stations! You see an image of yourself that is upright and half your size.

Station 1: Spoons…

Station 2: Gazing Globe

Station 3: Make-up mirror…

Station 4: Concave Mirror…

Station 5: Dark Box

Station 6: Practice problems

Station 7: Real vs. virtual images

Station 8: pg 30-33 + DWO


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