Multiple choice

If electromagnetic light waves do travel through a medium, how are they affected?

  1. they stop

  2. they slow down

  3. they disappear

  4. they speed up
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When light travels through a medium like glass or water, it interacts with the particles of the medium, which causes the wave to slow down compared to its speed in a vacuum.

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