Question

.Which of the following statements are correct?(a)Sound is produced by vibrations.(b). Sound requires a medium for propagation.(c). Light and sound both require a medium for propagation.(d). Sound travels slower than light

Answer 1

Answer:

The correct statements are:-

(a),(b),(d)

Explanation:

(a) is true as vibrations are the basic cause of sound.

(b) is true because sound is a mechanical wave and needs a material medium for its propagation.

(c) is false because light is an electromagnetic wave and does not require any medium for its propagation.

(d) is true as the speed of sound is 340 m/s in vacuum while the speed of light is 3×10^8 m/s.

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