Question

when a train arriving at a railway platform approaches a person standing on the platform,the noise produced by the engine increases.the phenomenon is governed by
a) kundt's Rule
b) Law of Tension
c) Law of Mass
d) Doppler's Effect

Answer 1

d) Doppler's effect is the right answer

Answer 2

When a train arriving at a railway platform approaches a person standing on the platform,the noise produced by the engine increases.the phenomenon is governed by Doppler's Effect.

Dopplers Effect can be defined as the change in frequency of a wave(light/sound,etc.) as the distance between the source and the observer reduces.