JEE Main 2022 Physics question
The velocity of sound in a gas, in which two wavelengths 4.08 m and 4.16 m produce 40 beats in 12 s, will be:
Answer: (4)
Solution
The beat frequency is v/4.08 − v/4.16 = 40/12. So v = (40/12) 4.16/0.08) = (40/12) m/s.