Question

Two waves represented by the following equation are travelling in the same medium 

y₁ = 5 sin 2π (75 t – 0.25 x), y₂ = 10 sin 2π (150 – 0.25 x)

The intensity ratio of the two waves is ……

(a) 1 : 2 

(b) 1 : 4 

(c) 1 : 8 

(d) 1 : 16

Answer 1

Correct answer is (b) 1 : 4