Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 2 – The Properties of Light

2 Objectives At the end of this presentation, you will be able to:

3 Describe what light is. Define the electromagnetic spectrum. Explain the three parts of light.

4 Electromagnetic Spectrum

5 Electromagnetic Spectrum Frequencies

6 Electromagnetic Spectrum Wavelengths

7 Radio Waves

8 Microwaves

9 Infrared Light Far Infrared (Emitted) Light Near Infrared (Reflected) Light

10 Visible Light Galaxy Images Ultraviolet Light Galaxy Images Ultraviolet Light

11 X-Rays May Be Manmade Metal Filling Tooth Jaw Bone

12 X-Rays Have Star Power

13 Gamma-Rays

14 Visible Light Spectrum

15 The Sum of the Visible Light Spectrum is White Light

16 Refraction

17 Three Primary Colors Green Red Blue

18 Three Secondary Colors Primary Secondary

19 Reflected Light White Light

20 Complementary Colors Primary Secondary

21 A Few Parting Thoughts Light is an electromagnetic force called a photon that behaves like a particle with no mass. Light is an electromagnetic force that behaves like a wave with no mass.

22 Three Properties of Light Wavelength (meters) Frequency (seconds) Energy (electron-volts) } Speed (m/s)

Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved End