What happens to light waves as they travel through the vacuum of space and enter the Earth's atmosphere?
Group of answer choices
A. Light waves speed up as they enter the Earth's atmosphere from space.
B. Light waves slow down as they enter the Earth's atmosphere from space.
C. Light waves continue at the same speed as they enter Earth's atmosphere.
D. Light waves slow down as they enter and then speed back up once they reach Earth.
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What happens to light waves as they travel through the vacuum of space and enter the Earth's atmosph...
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