Identify the statement that correctly describes light and how it travels? (2 points)

2 answers:

8 0

A vacuum implies an absence of any material, not just air. Light has a fixed speed in a vacuum of about 300,000km per second. There is no medium for electromagnetic radiation and the speed is unaffected by a moving source. The notion of the ether as a medium for light was found to be false by experiment. Answer a applies.

schepotkina [342]3 years ago

4 0

Light does not travel at a constant speed in a vacuum, compared to in air, because the light is being absorbed by atoms and molecules in the air. But light does travel at a constant speed in a vacuum.
So I agree with A
All that talk about moving forward is irrelevant (I think)

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