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AP® Physics 1 & 2

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Why Can Light Travel in a Vacuum?

APPH12-GQU5IL

Light is able to travel through empty space, but sound is not.

Which of the following are accurate explanations for this? Select TWO answers.

A

Light consists of a stream of particles moving away from the source, but sound relies on vibrating particles that were already present.

B

Light waves are much more energetic than sound waves, which must rely on existing matter for energy.

C

Light consists of oscillations of fields, and fields are properties of space (not matter).

D

Light waves move much faster than sound waves, so they get much further in space before the get stopped by the vaccum.