Question

If h is planks constant, $m_o$ is rest mass of electron and c is the speed of light in vacuum, the S.I unit of $\frac{h}{m_{0}C}$ is

• A. $A^0$
• B. Js
• C. Ns
• D. m

Answer 1

The correct option is D m

de Broglie wavelength,

$\lambda =\frac{h}{p}=\frac{h}{mv}$

and unit of $\lambda$ is $m$.

So, the answer is option (D).