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

4
Properties of Waves
wavelength
amplitude
amplitude
wavelength
5
Wavelengths of the Electro-Magnetic Spectrum
6
Wavelength and Colour
7
Seeing Colour
8
Pinhole Camera
9
How Light is Transmitted
10
Transparent allows light to pass through
Translucent allows some light to pass through
Opaque allows no light to pass through
11
Light Reflection
  • The reason we see objects is because they reflect
    light

12
Smooth Surface
13
Rough Surface
14
Reflection in a Plane Mirror
15
Activity 4.11
  • How Light Reflects

16
A
B
17
Law of Reflection
  • When light reflects off a surface, the angle of
    incidence is always equal to the angle of
    reflection

?i ?r
18
Looking in a mirror
19
Looking in a mirror
20
Looking in a mirror
21
Object distance vs. Image Distance
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