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Ultrasonic Sound

Waves that ca...

Question

Waves that can not travel in vacuum are

A

X-rays

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B

Infrasonics

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C

Ultraviolet

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D

Radio waves

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Solution

The correct option is B Infrasonics
Except infrasonic wave, all others are the electromagnetic waves which can propagates without a medium. But elastic waves, like infrasonic wave, they always needs a medium to propagate.

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