Problem

Given that

y = A \sin \left[ \left( \frac{2\pi}{\lambda} (ct - x) \right) \right]

, where

y

and

x

are measured in metres. Which of the following statements is true ? a. The unit of

\lambda

is same as that of

x

and

A

b. The unit of

\lambda

is same as that of

x

but not of

A

c. The unit of

c

is same as that of

\frac{2\pi}{\lambda}

d. The unit of

(ct - x)

is same as that of

\frac{2\pi}{\lambda}