how does sound pass through walls while light cannot pass through it ?

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Solution

Hi Kumar!

Sound is a mechanical wave whereas light is an electromagnetic wave. A mechanical wave is propagated by the oscillations in the particles of the medium. So, sound can travel through solids, liquids, gases and plasma. Although light does not require a medium for propagation, it cannot travel through an opaque object. The light gets reflected from the surface of the opaque object.
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