Which of the following statements are correct?

(i) Sound is produced by vibrations.

(ii) Sound requires a medium for propagation.

(iii) Light and sound both require a medium for propagation.

(iv) Sound travels slower than light.

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(i) and (ii)

(i), (ii) and (iii)

(ii), (iii) and (iv)

(i), (ii) and (iv)

answer is D.

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Detailed Solution

Sound is a form of energy that is produced by vibrations. It propagates through the vibration of molecules. Light can travel in vacuum also but sound requires a medium to travel. So, the speed of light is greater than sound. Thus, (i), (ii) and (iv) are correct.

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