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Chapter 16 Light

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Chapter 16 Light What is the illumination on a desk that is lit by a 32-cd point source that is 4 m above a table? I = 32 cd d = 4 m = 2 lm/m2 = 2 lux – PowerPoint PPT presentation

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Title: Chapter 16 Light


1
Chapter 16Light
  • What is the illumination on a desk that is lit by
  • a 32-cd point source that is 4 m above a table?

I 32 cd d 4 m
2 lm/m2 2 lux
2
Chapter 16Light
  • Spectrum The ordered arrangements of wavelengths

3
Chapter 16 Light
  • Red, green, and blue are primary colors of light
  • Yellow, cyan, and magenta are the secondary
    colors of light.

Complementary Colors Any two colors that combine
to make white light
http//www.phy.ntnu.edu.tw/java/image/rgbColor.htm
l
4
Chapter 16 Light
Thin Film Interference Light Interference
caused by reflection from the front and back
surface of a thin layer of a solid or a liquid.
5
Chapter 16 Light
When a light wave strikes a film, part of it is
reflected, as shown by R1 and part is
transmitted. The transmitted wave travels through
the film to the back surface, where it is
reflected, as shown by R2
R1
R2
R1
R2
6
Chapter 16 Light
Polarized Light Light that vibrates in a single
plane.
7
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9
Wave-Particle Duality Light Does light consist
of particles or waves? When one focuses upon the
different types of phenomena observed with
light, a strong case can be built for a wave
picture
Wave Particle
Phenomenon Reflection Refraction Interference
Diffraction Polarization Photoelectric Effect
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
No
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