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Light and the Electromagnetic Spectrum

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Light and the Electromagnetic Spectrum Light as a Wave light is a visible form of energy most of the energy that surrounds us is invisible this energy travels in ... – PowerPoint PPT presentation

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Title: Light and the Electromagnetic Spectrum


1
Light and the Electromagnetic Spectrum
2
Light as a Wave
  • light is a visible form of energy
  • most of the energy that surrounds us is invisible
  • this energy travels in waves made of electric and
    magnetic fields
  • called Electromagnetic Radiation

3
  • Light is the only form of energy that can travel
    like a wave through empty space and through some
    materials.

4
  • Light waves are called electromagnetic waves.
    Similar to water waves, light waves involve the
    movement of energy from one point to another.
    These waves are invisible and can travel through
    a vacuum. (This means they do not require
    particles of matter in order to move.) The waves
    travel at 3 x 108 m/s (the speed of light).

5
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6
Light as a Wave
  • Electromagnetic Spectrum the entire range of
    visible and invisible energy waves

7
Properties of Waves
wavelength
amplitude
amplitude
wavelength
8
Wavelengths of the Electro-Magnetic Spectrum
9
Wavelength and Colour
10
Seeing Colour
11
How Light is Transmitted
12
Transparent allows light to pass through
Translucent allows some light to pass through
Opaque allows no light to pass through
13
Light Reflection
  • The reason we see objects is because they reflect
    light

14
Smooth Surface
15
Rough Surface
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