Photoelectric Effects and deBroglie Equation: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Photoelectric Effects and deBroglie Equation. Understanding the underlying formula is key to arriving at the correct answer below:

Momentum of a photon is $p = \frac{E}{c}$. Energy $E = 1 MeV = 10^6 \times 1.6 \times 10^{-19} J = 1.6 \times 10^{-13} J$. $p = \frac{1.6 \times 10^{-13}}{3 \times 10^8} \approx 5.33 \times 10^{-22} kg m/s$.