Question

The de-Broglie wavelength associated with a particle with rest mass $m_0$ and moving with speed of light in vacuum is ___________.

• A. $\frac{h}{m_{0}c}$
• B. $0$
• C. $\infty$
• D. $\frac{m_{0}c}{h}$

Answer 1

The correct option is A $\frac{h}{m_{0}c}$

De-Broglie wavelength $\lambda =\frac{h}{p}$

where $h=$Plank's constant

$p=$ momentum associated with a particle

Given:

$mass=m_o$

$speed=c$

Therefore $p=m_{o}c$

Hence $\lambda =\frac{h}{p}=\frac{h}{m_{o}c}$

Therefore the correct option is (A).