Which of the following does not require medium to propagate ?

Radio-waves

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Water-waves

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Sound-waves

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Waves in string

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Solution

The correct option is A Radio-waves
Out of the given waves , radio-waves are electromagnetic waves and all other waves are mechanical waves . Electromagnetic waves don't require medium to propagate because they are formed by changing magnetic and electric field , and these fields don't require any medium to propagate . Therefore radio-waves don't require medium to propagate .

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Similar questions

Why does sound require a medium to propagate why can't it propagate in vacuum?

Sound requires a material medium for its propagation while light does not require any material medium for its propagation.

The correct statement is :

(a) Sound and light both require medium for propagation

(b) Sound can travel in vacuum, but light can not

(d) Sound and light both can travel in vacuum.

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