Why is sound heard more clearly at night than during the day over large distances outdoors?

Type: MCQ • Marks: 1

A. Refraction of sound waves downward toward the ground due to cooler air layers near the surface at night

B. Wind stops completely

C. Air becomes a vacuum at night

D. Ground stops vibrating

Explanation

Nighttime temperature gradients refract upward sound waves back down toward the Earth's surface.

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Class 9th Science (MCQ)

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