Question

The dimensional formula of wave number is

• A. $[M^0{L}^0{T}^0]$
• B. $[M^0{L}^{-1}{T}^0]$
• C. $[M^0{L}^0{T}^{-1}]$
• D. $[M^{-1}{L}^{-1}{T}^0]$

Answer 1

Answer: (B)

Wave number $=\frac{1}{\lambda }$
$\therefore$ Dimensions of wave number
$=\left[M^0{L}^{-1}{T}^0\right]$