If the speed of a wave doubles as it passes from shallow water into deeper water, its wavelength will be

Options

A. unchanged
B. halved
C. doubled
D. quadrupled

Answer

C

Explanation

Since frequency remains unchanged
`v=v' implies v/lambda=(v')/(lambda ')=(2v)/(lambda')` or `lambda'=(2v)/v lambda =2 lambda`
Hence, its wavelength will becomes twice.