Question

Photon and electron are given same energy $(10^{-20}J)$. Wavelength associated with photon and electron are ${\lambda }_p$ and ${\lambda }_e$, the correct statement will be

• A. ${\lambda }_p>{\lambda }_e$
• B. ${\lambda }_p<{\lambda }_e$
• C. ${\lambda }_p={\lambda }_e$
• D. $\frac{{\lambda }_e}{{\lambda }_p}=c$

Answer 1

Answer: (A)

Wavelength of photon will be greater than that of electron because mass of photon is less than that of electron
$\Rightarrow {\lambda }_p>{\lambda }_e$