A person with vibrating tuning fork of frequency 338 ~Hz is moving towards a vertical wall with a speed of 2 ~ms ⁻¹ . Velocity of sound in air is 340 ~ms ⁻¹ . The number of beats heard by that person per second is

Step-by-step solution

As the person having tuning fork is moving towards a wall, therefore, array ll & v_ s =v₀=2 ~m / s (given) So, & f^ f = v+v₀ v-v₀ & f^ -f f = v+v₀-v+v₀ v-v₀ & f f = 2 v₀ v-v₀ or & f= 2 v₀ v-v₀ f= 2 2 338 (340-2) =4 array