Correct Answer:
C. Zero
Correct answer: Zero. A photon is a particle of light with zero rest mass.
Background: Photons carry energy and momentum but have no rest mass.
- 1: 1 is not the mass of a photon.
- 0.5: 0.5 is not the mass of a photon.
- Infinite: An infinite mass is impossible for a photon.
Did you know? They travel at the speed of light.
Memory trick: Photon = massless.