Question

The Velocity of photons is (1) 3×10raised power 8 (2) 3×10 raised power 10 (3) All of them

Answer 1

$\text{The velocity of photon is same as the} \\ \text{velocity of light }\\ \\ \text{So velocity of photon will be } = 3 \times 10^8 \: \ m/s$