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Physics, 14.10.2019 20:00 sassy11111515

Which statement about electromagnetic waves is true?
a. electromagnetic waves require a medium to travel.
b. electromagnetic waves don't require a medium to travel.
c. the particles of the medium through which electromagnetic waves travel vibrate perpendicularly to the direction of the wave.
d. the particles of the medium through which electromagnetic waves travel vibrate parallel to the direction of the wave.

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Which statement about electromagnetic waves is true?
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