Question

If the energy of a photon is 10 eV, its momentum is:

• A. 5.33 × 10⁻²³ kg m/s
• B. 5.33 × 10⁻²⁵ kg m/s
• C. 5.33 × 10⁻²⁹ kg m/s
• D. 5.33 × 10⁻²⁷ kg m/s

Hint:

Photon momentum depends only on energy.

Answer 1

The Correct Option is D

Step 1: Relation between energy and momentum. p = (E)/(c)
Step 2: Substituting values. p = 10 × 1.6 × 10⁻¹⁹3 × 10⁸ ≈ 5.33 × 10⁻²⁷