Question

true or false Light travels at a speed of 300,000 km/s in outer space but can slow in different materials like glass or water.​

Answer 1

Answer:

yes , this is because the change in the medium by which it is passed.

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Answer 2

Answer:

Hello!

it is true.

Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water.