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L I G H T

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L I G H T Light carries energy A light source (sun, light bulb) gives off light waves www.howstuffworks.com/ light-bulb.htm Light waves Are like the ripples in ... – PowerPoint PPT presentation

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Title: L I G H T


1
L I G H T
  • Light carries energy
  • A light source (sun, light bulb) gives off light
    waves

www.howstuffworks.com/ light-bulb.htm
2
Light waves
  • Are like the ripples in water when you drop a
    rock in it
  • Go out in all directions
  • Are called electromagnetic waves

3
Light Wave Lengths are
  • The distance between the tops of two adjacent
    ripples

4
Frequency is
  • The number of wave lengths that pass a point in
    one second. These are some examples of different
    wavelengths.

5
Electromagnetic Spectrum
  • Electromagnetic waves are classified according to
    their wave lengths and frequencies
  • There are many light waves that we cannot see
  • We can only see a very small part of the
    electromagnetic waves

6
Electromagnetic Waves
  • As the wave length decreases the frequency
    increases this decides what we can see.

7
Questions
  • What is a light wave?
  • What is a light wave length?
  • What is meant by the frequency of a wavelength?
  • How are electromagnetic waves classified?
  • How much can we see of the electromagnetic
    spectrum of light?

8
Works Cited
  • Imagine the Universe
  • http//imagine.gsfc.nasa.gov/docs/science/know_l1/
    emspectrum.html
  • electromagnetic wave lengths
  • NASA Imaginers
  • http//imagers.gsfc.nasa.gov/ems/waves2.html
  • Animated wave lengths
  • Visible light graphics
  • Site Format
  • http//www.siteformat.com/tutorials/photoshop/misc
    /waterripples.html
  • blue ripple image
  • Google
  • http//images.google.com/images?qlightbulbsvnum
    10hlenlrieUTF-8oeUTF-8start100saN
  • Light bulb picture
  • Google
  • Sun picture
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