Q112 / 200 · NEET 2024 · Physics
If $c$ is the velocity of light in free space, the correct statements about photon among the following are:
A. The energy of a photon is $E=h v$.
B. The velocity of a photon is $c$.
C. The momentum of a photon, $p=\frac{h \nu}{c}$.
D. In a photon-electron collision, both total energy and total momentum are conserved.
E. Photon possesses positive charge.
Choose the correct answer from the options given below:
- Correct answerAA, B, C and D only
- BA, C and D only
- CA, B, D and E only
- DA and B only
Solution
(A) If $c$ is the velocity of light
so, $E=h \nu$ (Energy of photon)
(B) Velocity of photon is equal to velocity of light i.e. $c$.
(C) $\lambda=\frac{h}{p}$
$\begin{aligned}
& p=\frac{h}{\lambda} \\
& p=\frac{h \nu}{c}
\end{aligned}$
(D) In photon-electron collision both total energy and total momentum are conserved.
Hence, the correct answer is option: 'A'.