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Q.

Light can travel in vacuum but not sound, because

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a

sound waves are electromagnetic in nature

b

light waves are not electromagnetic in nature

c

light waves are electromagnetic in nature

d

speed of sound is very much slower than light

answer is B.

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Detailed Solution

Light waves are electromagnetic in nature. Therefore, they do not require a medium for propagation. Thus, the light can travel in vacuum. On the other hand, sound waves require a medium for their propagation.

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