Wave light sound and electomagnetic spectrum study guide
This presentation is the property of its rightful owner.
Sponsored Links
1 / 24

“WAVE” , LIGHT, SOUND AND ELECTOMAGNETIC SPECTRUM STUDY GUIDE PowerPoint PPT Presentation


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

“WAVE” , LIGHT, SOUND AND ELECTOMAGNETIC SPECTRUM STUDY GUIDE. FOR: MRS. GROM’S SCIENCE CLASS BY: MRS. CAMUTO. THE TWO TYPES OF WAVES!. LONGITUDINAL TRANSVERSE 1.) COMPRESSIONS – (close together) 1.) CREST - (highest point)

Download Presentation

“WAVE” , LIGHT, SOUND AND ELECTOMAGNETIC SPECTRUM STUDY GUIDE

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


Wave light sound and electomagnetic spectrum study guide

“WAVE” , LIGHT, SOUND AND ELECTOMAGNETIC SPECTRUM STUDY GUIDE

FOR: MRS. GROM’S SCIENCE CLASS

BY: MRS. CAMUTO


The two types of waves

THE TWO TYPES OF WAVES!

  • LONGITUDINAL TRANSVERSE

    1.) COMPRESSIONS – (close together)1.) CREST - (highest point)

    Represented by the coils of the spring being Represented by the coils of the spring where

    CROWDED TOGETHER. there is a MAXIMUM DISPLACEMENT

    UPWARD of the particles.

    2.) RAREFRACTION – (far apart) 2.) TROUGH – (lowest point)

    Represented by the coils of the spring that Represented by the coils of the spring where

    are SPACED APART. there is a MAXIMUM DISPLACEMENT

    DOWNWARD of the particles.


Transverse waves

TRANSVERSE WAVES

CREST - highest point of a wave

X

TROUGH - lowest point of a wave

In this type of wave, the MOTION of the WAVE and the DIRECTION of the wave are at RIGHT ANGLES.


Parts of the longitudinal wave

PARTS OF THE LONGITUDINAL WAVE

COMPRESSIONS – part of the wave where the particles are CLOSE (crowded) together.

RAREFRACTIONS – part of the wave where the particles are SPACED APART.


What is a wave

WHAT IS A WAVE?

Waves CAN BE transmitted through ALL PHASES OF MATTER (solid, liquid and gas)

  • A wave is - ANY DISTURBANCE that causes energy to travel from place to place. In other words, ALL WAVES TRANSFER ENERGY THROUGH A MEDIUM.

  • WAVESare created when a SOURCE OF ENERGY causes a MEDIUM to VIBRATE.

  • All waves, however, share certain basic characteristics:

  • ALL WAVES HAVE:

    1.) amplitude

    2.) wavelength

    3.) frequency..


Amplitude

AMPLITUDE

Amplitude

  • The maximum distance the medium (the material through which a wave travels) moves away from its rest position.  The higher the wave moves up-and-down as it vibrates, the larger the amplitude of the resulting waves.

  • In simple terms,

    • AMPLITUDE IS THE HEIGHT OF THE WAVE!

  • Waves with high energy have a LARGE amplitude.

  • Waves with low energy have a SMALL amplitude.


Wavelength

WAVELENGTH!

WAVELENGTH –

The distance between two consecutive (one after another) SIMILAR points on a wave; in other words,

***a measurement from one crest or trough to the next on a wave is called the

wavelength. 

The wavelength can be measured from any point on a wave as long as it is measured to the same point on the next wave.

This is ONE wavelength.

These are measured in METERS.

This is ONE wavelength


Frequency

FREQUENCY

FREQUENCY    -

the number of complete waves,

or complete cycles, per unit of time

Because every complete wave has one crest and one trough, you can think of the frequency as the number of crests or troughs produced per unit time. 

The unit used to measure wave frequency is called the hertz (Hz). 

HERTZ is the SAME as

ONE WAVE PER SECOND!


Waves need a medium

WAVES NEED A MEDIUM!

  • MEDIUM –

  • the material through which a wave travels through –

  • This includes ALL phases of MATTER.

  • TYPES OF MEDIUMS –

    -LAND

    -WATER

    -AIR

Remember: this medium will NOT move as a whole as the ENERGY is transmitted through it.


Sound waves

SOUND WAVES

  • A sound wave is different than a light wave in that a sound wave is not capable of traveling through a vacuum.

    (in other words, SOUND cannot travel through outer space.)

    ****SOUND WAVES become PAINFUL at 120 decibels.

Sound is a

Mechanical Wave

MECHANICAL WAVES

MUST have a MEDIUM to travel / pass through.


Electromagnetic waves

ELECTROMAGNETIC WAVES

  • An electromagnetic wave is a wave which is capable of transmitting its energy through a vacuum

    (i.e., empty space).

  • All light waves are examples of electromagnetic waves.

  • LIGHT can travel through outer space!


Light waves

LIGHT WAVES

Light waves can pass through many media: air, water, glass, to name a few.

Light waves do not need any medium to travel.

Sunlight, moonlight, and starlight pass through the vacuum of outer space to reach us.


Refraction

REFRACTION

  • Refraction occurs when light passes into a transparent material.

  • An example of this is when a PENCIL SEEMS TO BEND when you place it in a glass of water!


Reflection

REFLECTION

  • Reflection occurs when light bounces off an opaque material.

  • IN OTHER WORDS –

    The wave STRIKES the boundary and bounces back!


Law of reflection

LAW OF REFLECTION

  • In this law the

    ANGLE OF INCIDENCE is EQUAL TO the

    ANGLE OF REFLECTION.

    C = the INCIDENT WAVE

    A = the ANGLE OF INCIDENT

    B = the ANGLE OF REFLECTION

    D = the REFLECTED WAVE

C

D

A

B

When a WAVE strikes a barrier, it can be ABSORBED or REFLECTED.


There are three ways light can act they are found in the next three boxes

THERE ARE THREE WAYS LIGHT CAN ACT!(They are found in the next three boxes!)

1.) TRANSPARENT – Objects which allow ALL light to pass through.

  • OTHER EXAMPLES - window glass,

    drinking glass


Another way light can act

ANOTHER WAY LIGHT CAN ACT!

  • 1.) TRANSLUSENT – Objects which allow SOME light to pass through.

  • Like –

  • Stained glass windows

  • Wax paper


The third way light acts

THE THIRD WAY LIGHT ACTS!

  • OPAQUE - Objects which allow NO light to pass through;

  • These items CAST SHADOWS!


The primary colors of light

THE PRIMARY COLORS OF LIGHT!

  • *** PRIMARY COLORS – Red, Green and Blue!

  • ***SECONDARY COLORS – Magenta, yellow, cyan 


Illuminated objects

ILLUMINATED OBJECTS

LUMINATED –

Objects which get their light from another source.

There are MANY examples. (LOOK LEFT)


Luminous objects

LUMINOUS OBJECTS!

  • LUMINOUS - Objects which produce their OWN source of light

  • There are MANY examples of these!

    (LOOK LEFT!)

The sun

the light in the lighthouse

A campfire

stars

A candle’s flame


The electro magnetic spectrum

THE ELECTRO-MAGNETIC SPECTRUM!

YOU MUST KNOW THIS DIAGRAM!

***Electromagnetic energy – both VISIBLE and INVISIBLE

***Lowest frequency / longest wavelength – RADIO WAVES

***Highest frequency / shortest wavelength – GAMMA RAYS


The visible light spectrum

THE VISIBLE LIGHT SPECTRUM!

***VISIBLE LIGHT – the colors of the “rainbow” -REMEMBER – ROY G BIV

 (Red, Orange, Yellow, Green, Blue, Indigo, Violet)

  • Longest wavelength / Lowest frequency – RED than orange, etc.

  • Shortest wavelength / Highest frequency – Violet than Indigo, etc.


Facts about light

FACTS ABOUT LIGHT!

***LIGHT is a TRANSVERSE WAVE

***LIGHT needs NO medium to travel on, therefore, you CAN SEE IT in outer space!

***LIGHT travels in a straight line; it will not bend!

***LIGHT WAVES travel FASTER

than SOUND WAVES!


  • Login