Question

An electron of mass m and a photon have same energy E. If their de Broglie wavelengths $λ$ are $λ_e$ and $λ_p$, respectively, then $\frac{λ_e}{λ_p}$ is proportional to,

• A. E
• B. $\sqrt{E}$
• C. $E^{{-1}/{2}}$
• D. independent of E

Answer 1

Answer: (B)

$\sqrt{E}$

Answer 2

The correct option is (B): $\sqrt{E}$