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(C) Sound waves have a much longer wavelength compared to light waves. For diffraction to occur significantly, the size of the obstacle or aperture $(

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Diffraction of sound waves

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(C) Sound waves have a much longer wavelength compared to light waves. For diffraction to occur significantly, the size of the obstacle or aperture $(a)$ must be comparable to the wavelength $(\lambda)$ of the wave, i.e., $a/\lambda \approx 1$. Since the wavelength of sound waves is large and comparable to the size of doors or windows, they bend around the corners of these obstacles and reach the person outside. This phenomenon is known as the diffraction of sound waves.

$A$ person outside a room can hear the conversation happening inside the room because of...

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