Question

if the ratio of the intensities of 2 sounds is 4:9 , what is ratio of their amplitude ?

(Given : Intensity is directly proportional to the square of amplitude )

Answer 1

We know,

Intensity α Amplitude²

Let the intensities be I₁ and I₂ and the corresponding amplitudes be A₁ and A₂.

Therefore,

I₁ : I₂ = A₁² : A₂² = 4 : 9

= > A₁ : A₂ = 2 : 3