Ratio of intensities of two waves is 4 : 1. Then ratio of amplitudes of the two waves is:
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Ratio of intensities of two waves is 4 : 1. Then ratio of amplitudes of the two waves is:

G1 Physics · Accepted Answer

Step 1: Light intensity is proportional to square of wave amplitude: I ∝ a². Step 2: a₁/a₂ = √(I₁/I₂) = √4 = 2. Final answer: (A) 2 : 1.