WAVES Electromagnetic spectrum Colors of v light Primary colors of

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WAVES Electromagnetic spectrum Colors of v light Primary colors of Powered By Docstoc
					   Electromagnetic spectrum, Colors of
              v
light, Primary colors of paint, and Lasers

              Mr. Loth’s
          7th Grade Science
        Created by: Mr.Whittaker
    Properties of the Wave
Label
the             Wavelength
parts           distance from one crest
of the          to the or trough to trough      Crest highest point
wave.




     Trough                                  Amplitude         from rest
         lowest point                        point to crest from rest
                                             point to trough
        How are waves measured ?
Fill in the blanks below.

# of waves that pass during a certain time Frequency


a unit of measurement = to 1 wave/sec.                  Hertz

  The amount of ENERGY in a wave is measured in
    Amplitude
  __________________.       Go back to see Properties of a Wave slide
     Electromagnetic Waves                Click on the title for a link
                  Visible light waves   (ones we can see)
Label the
waves in order.            4




     1            2                 6                         7

                       3       5

Radio Waves               group of
                    WhatMicrowaves
Ultraviolet               is the
                    wavesInfrared
Which wave has the                 Which wave has the
                    smallest?
Gamma rays
HIGHEST Frequency ?      X-rays LOWEST Frequency?
Name all seven colors of visible light.

   ROY                   G                BI V
   E R E Colors of Visible light
                         R                L N I

     A L                U D O
   D     Remember the rainbow!
                E
                        E I
         N L             E                      L
                                            G
         G O             N                      E
                                            O
         E W                                    T
        Frequency & Wavelength!

Radio Waves   Microwaves     X-ray    Gamma rays




               Which end has the
              Which waves have the
                Which end has the
  Low         longest WAVELENGTH?
                highest FREQUENCY?
               shortest WAVELENGTH?
                                           High
  Frequency                                Frequency
 Match the following waves with their uses.

                                             A remote
Infrared Waves           A lamp




Visible Light
                  Airport
                                       Flashlight
                  Security



 X-rays
                                           Food
                                           Warmer

                      Doctors office
Match the following waves with their uses
Radio Waves
                          Microwave
                                       Hand Stamp           Treat Cancer
Microwave           GPS




                                                           Radio AM
Ultraviolet Light                                          FM




 Gamma Rays                               Satellite Dish
                          Television                       Tanning Bed
                   Wave Properties
Reflection          – bouncing of a wave
Click for a link
                    off a surface

                    Refraction
                     Click for a link
                                        -bending       of a wave
                                        -as   it enters a new material
                     pencil in water, fishing, and contacts/glasses, telescopes, cameras
Doppler
Effect               -moving source or receiver causes
                      frequency of wave to change
    Primary Colors of Light
These are
the only
waves
visible to
the human
eye.
                  All the colors
What are          together make
                  white light
What color of
the Primary
light do you
colors of all
see when light?
colors are
present?
         Primary Colors of Paint
What are
the primary
colors of
paint?


.                     Black
What color
of do you
see when all
colors are
present?
   Uses for Lasers
Read Bar Codes – Grocery store
Surgery – eye surgery and arthroscopic
Straight lines – laser level
Optic fibers – telephone, computer, cable TV
CD/DVD players
Track – finish line/Olympics
Dentistry
Military – laser sight, laser guided missiles
Birthmark removed
Laser printers
Laser pointers
Cut things out of metal/wood
Difference between Lasers and Visible light
 Laser                          Visible
 Focused beam             Rays spreads out
 Single wavelength   All different wavelengths
 Organized                Unorganized

				
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posted:5/19/2012
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