Question
Given that , where y and x are measured in metre. Which of the following statements is true?
The unit of λ is same as that of x and A
The unit of λ is same as that of x but not of A
The unit of c is same as that of
The unit of ( ct - x ) is same as that of
Solution
A.
The unit of λ is same as that of x and A
Here is dimensionless
Hence, is also dimensionless and unit of ct is the same as that of x. Therefore unit of λ is same as that of x.
Also unit of y is same as that of A, which is also the unit of x.
