Question

The speed of sound wave in a gas, in which two waves of wavelengths 1.0 m and 1.02 m produce 6 beats per second is –

• A. 350 m/s
• B. 306 m/s
• C. 380 m/s
• D. 410 m/s

Answer 1

Answer: (D)

410 m/s

Answer 2

L¢ = 2L, d¢ = 2d & T¢ = 2T

n = $\sqrt{\frac{T}{m'}}$