Question

Given that y = A sin $\left\lbrack \left( \frac{2\pi}{\lambda}(ct - x) \right) \right\rbrack$, where y and x are measured in metres. Which of the following statements is correct?

• A. The unit of (ct – x) is same as that of $\frac{2\pi}{\lambda}$
• B. The unit of c is same as that of $\frac{2\pi}{\lambda}$
• C. The unit of l is same as that of x but not of A
• D. The unit of l is same as that of x and A

Answer 1

Answer: (D)

The unit of l is same as that of x and A

Answer 2

dimension of l will be equal to x and A