April 2021
Intermediate to advanced
336 pages
9h 54m
English
Content preview from Light — Science & Magic, 6th Edition
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16 LIGHT: THE RAW MATERIAL OF PHOTOGRAPHY
2.3
This diagram shows
the electromagnetic
spectrum. Notice that
visible light is but one
small part of it.
Visible
X-Ray
Ultraviolet
Infrared Radar Radio
1,000 million MHz 10 MHz
1,000,000 million MHz
Electromagnetic radiation can travel through a vacuum and through
some forms of matter. We know that light, for example, can pass through
transparent glass.
Electromagnetic radiation is not closely related to mechanically trans-
mitted energy, such as sound or heat, which can travel only through matter.
(Infrared radiation and heat are oen confused because they tend to accom-
pany one another.) ...
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