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20.04.2020 •
Physics
Photos A and B both show the same field of view containing a star-forming molecular cloud. One of the photos was taken in visible light and the other in infrared light. Which one is the visible-light photo, and how do you know?
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Ответ:
Sound waves travel through air at the speed of approximately 1,100 feet per second; light waves travel through air and empty space at a speed of approximately 186,000 miles per second. ... Although both are forms of wave motion, sound requires a solid, liquid, or gaseous medium; whereas light travels through empty space.