A point source of sound emits energy equally in all directions at a constant rate and a person 8 m from the source listens.After a while intensity is halved. If the person wishes the sound to seem as loud as before, how far shudder he be from source now?

Ans: 4*2^0.5

Question

A point source of sound emits energy equally in all directions at a constant rate and a person 8 m from the source listens.After a while intensity is halved. If the person wishes the sound to seem as loud as before, how far shudder he be from source now?

Ans:  4*2^0.5

experimentx · Answer

Intensity is inversely proportional to square of distance

experimentx · Answer

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divide those equations and get r2