Question

The superposition takes place between two waves of frequency f and amplitude a. The total intensity is directly proportional to

• A. a
• B. 2a
• C. 2a²
• D. 4a²

Answer 1

Answer: (D)

4a²

Answer 2

I $\propto \left( a_{1} + a_{2} \right)^{2}$ [As a₁ = a₂ = a]

I $\propto 4a^{2}$