Which of the following is not true for the progressive wave
`y=4sin2pi((t)/(0.02)-(x)/(100))`
where x and y are in cm and t in seconds.

Options

A. Its amplitude is 4 cm
B. Its wavelength is 100 cm
C. Its frequency is 50 cycles/sec
D. None of the above

Answer

D

Explanation

`y=4sin2pi((t)/(0.02)-(x)/(100))`
(a) `A=4cm`
(b) `lambda=(2pi)/(k)=(2pi)/((2pi)/(100))=100cm`
(c) `f=(omega)/(2pi)=(2pi)/(0.02)xx(1)/(2pi)=50Hz`
(d) `v=(omega)/(k)=(2pi)/(0.02)xx(100)/(2pi)=5xx10^(3)cm//s`