10 9 7 th grade agenda
This presentation is the property of its rightful owner.
Sponsored Links
1 / 21

10/9 - 7 th Grade Agenda PowerPoint PPT Presentation


  • 82 Views
  • Uploaded on
  • Presentation posted in: General

10/9 - 7 th Grade Agenda. Payday Collect: HW: p.33- 34 Waves and Electromagnetic Spectrum Class Reading: p. 42- 44 HW: Workbook: p. 35- 36. Electromagnetic Wave. An electromagnetic wave consists of vibrating electric and magnetic field that move through space at the speed of lig____. ht.

Download Presentation

10/9 - 7 th Grade Agenda

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


10 9 7 th grade agenda

10/9 - 7th Grade Agenda

Payday

Collect: HW: p.33- 34

Waves and Electromagnetic Spectrum

Class Reading: p. 42- 44

HW: Workbook: p. 35- 36


Electromagnetic wave

Electromagnetic Wave

  • An electromagnetic wave consists of vibrating electric and magnetic field that move through space at the speed of lig____

ht


What are some examples of electromagnetic waves

What are some examples of electromagnetic waves?

  • Radio Waves

  • TV Signals

  • Microwaves

  • Infrared rays

  • Light

  • Ultraviolet rays

  • X-Ray


How fast do electromagnetic waves travel

How fast do electromagnetic waves travel?

  • It is the fastest thing in the universe

  • 300,000 km per second

  • 186,000 miles per second

  • It takes 8 minutes for light to travel from the sun to the earth

  • It takes 3 million years for light to travel from the nearest galaxy (andromeda) to the earth


Electromagnetic wavelength

Electromagnetic Wavelength


How do we use radio waves

How do we use Radio Waves?

  • Radio & TV signals

  • Microwave Oven

  • Radar

  • MRI

  • Cell phone


Using microwaves

Using Microwaves

  • Why do you see sparks you put metal objects in a microwave?

  • Because of the build up of electrical energy in the metal

  • The long wave length of Microwaves can pass right through glass and plastic. That is why microwaves do not heat glass and plastic containers.


How do we use infrared rays

How do we use Infrared Rays?

  • Conventional Oven

  • Heat Lamps

  • Thermograms


Visible light makes up only a small part of the electromagnetic spectrum

Visible Light makes up only a small part of the electromagnetic spectrum


10 9 7 th grade agenda

Wave

  • A wave is a disturbance that transfer ene_____ from place to place.

  • Who can give me examples of waves?

rgy


Is light a wave

Is light a wave?

  • Yes

  • But why?


Picture of light wave

Picture of Light Wave

  • Image of a pulse of light that is 2.5 billionths of a millionth of a second long


Energy

Energy

  • In science, energy is defined as the ability to do wo___.

rk


Medium

Medium

  • The material through which a wave tra____ is called a medium

  • Who can give me examples of medium?

vels


Does light waves need a medium

Does Light Waves need a medium?

  • Scientist first thought that Light needed to travel through a medium. So they invented the idea of aether in space.

  • They look for aether in outer space but they found nothing.

  • So, Light Waves can travel without a medium even in a Vacuum of outer space.


Crest

Crest

gh

  • Hi___ point of a wave is called a crest


Trough

Trough

ow

  • L___ point of a wave is called a trough


Amplitude

Amplitude

imum

  • Amplitude is the max______ distance that the particles of medium carrying the wave move away from their rest positions.

  • Which rope has higher amplitude?


Wavelength

Wavelength

  • The distance between two corresp______ parts of a wave is its wavelength.

  • Which rope has longer wavelength?

onding


Frequency

Frequency

  • Wave frequency is the num_____complete waves that pass a given point in a certain amount of time

ber


  • Login