Sound waves of wavelength lamdatravelling in a medium with a speed of v m/s enter into another medium where its speed is 2v m/s. Wavelength of sound waves in the second medium is

Sound waves of wavelength lamdatravelling in a medium with a speed of

1.	Sound waves of wavelength lamdatravelling in a medium with a speed of v m/s enter into another medium where its speed is 2v m/s. Wavelength of sound waves in the second medium is
Answer» `lamda` `(lamda)/(2)` `2lamda` `4lamda` Solution :We have ,` V = F lamda implies v prop lamda (because f =` CONSTANT) `implies (v_(1))/( v_(2)) = (lamda _(1))/( lamda_(2)) implies (v)/( 2c) = (lamda)/( lamda_(2)) implies lamda_(2) = 2 lamda `