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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 16 - Waves and Acoustics > A sound wave of wavelength λ travels towards the right horizontally with a velocity V. It strikes and reflects from a vertical plane surface, travelling at a speed v towards the left. The number of positive crests striking in a time interval of 3 s on the wall is

A sound wave of wavelength λ travels towards the right horizontally with a velocity V. It strikes and reflects from a vertical plane surface, travelling at a speed v towards the left. The number of positive crests striking in a time interval of 3 s on the wall is

A sound wave of wavelength λ travels towards the right horizontally with a velocity V. It strikes and reflects from a vertical plane surface travelling at a speed v towards the left. The number of positive crests striking in a time interval of 3 s on the wall is