1. Chapter 16 Notes
Fundamentals of Light

2. Section 16.1 Objectives
Determine the effect of distance on light’s illuminance.
Calculate illuminance and luminous flux.
Solve problems involving the speed of light.

3. Characteristics of Light
Particle (photon)
Wave
Electromagnetic waves

4. Electromagnetic Waves

5. Speed of Light
c = 3.00 x 108 m/s
Relationship between frequency, wavelength, and speed is as follows: c = fλ
Albert A. Michelson

6. Example Problem
The AM radio band extends from 5.4x105 Hz to 1.7x106 Hz. What are the longest and shortest wavelengths in this frequency range?

7. Waves as Rays

8. Sources of Light
Opaque media
Transparent media
Translucent media

9. Illuminance
Luminous flux
Illuminance

10. Example Problem
What is the illuminance at on your desktop if it is lighted by a 1750 lm lamp that is 2.50 m above your desk?

11. Section 16.2 Objectives
Predict the effect of mixing colors of light and pigments.
Explain how light is polarized.
Explain the Doppler effect as it pertains to light.

12. Color

13. Color by Addition of Light
Primary colors
Secondary colors

14. Color by Subtraction of Light
Primary pigment
Secondary pigment

16. Polarization by Filtering

18. The Doppler Effect