How does a photon accelerate to light speed so quickly?

Does a photon instantaneously gain the speed of light or do they

What happens at the speed of light? If photon had “clock” on board

How does a photon know to travel at the speed of light?

How do photons reach the speed of light? Is it always the same, or

Home - Ask an Astronomer

As light from a star spreads out and weakens, do gaps form between

What happens at the speed of light? If photon had “clock” on board

What happens at the speed of light? If photon had “clock” on board