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Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 2 – The Properties of Light
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2 Objectives At the end of this presentation, you will be able to:
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3 Describe what light is. Define the electromagnetic spectrum. Explain the three parts of light.
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4 Electromagnetic Spectrum
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5 Electromagnetic Spectrum Frequencies
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6 Electromagnetic Spectrum Wavelengths
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7 Radio Waves
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8 Microwaves
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9 Infrared Light Far Infrared (Emitted) Light Near Infrared (Reflected) Light
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10 Visible Light Galaxy Images Ultraviolet Light Galaxy Images Ultraviolet Light
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11 X-Rays May Be Manmade Metal Filling Tooth Jaw Bone
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12 X-Rays Have Star Power
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13 Gamma-Rays
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14 Visible Light Spectrum
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15 The Sum of the Visible Light Spectrum is White Light
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16 Refraction
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17 Three Primary Colors Green Red Blue
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18 Three Secondary Colors Primary Secondary
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19 Reflected Light White Light
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20 Complementary Colors Primary Secondary
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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.
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22 Three Properties of Light Wavelength (meters) Frequency (seconds) Energy (electron-volts) } Speed (m/s)
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Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved End
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