system
Given the following post, respond as if you're commenting on Reddit:
human
Can a photon move in a straight line ?

Something like 0 Hz frequency  ?
gpt
All photons move in straight lines.

I think, from your question, you are misunderstanding the wave nature of light.  The photon does not move along the wiggles of a sine curve.  That sine curve represents the strength of the electromagnetic field as the light travels through space.  But the light beam itself goes in a straight line.

(Incidentally, in general relativity, where spacetime itself is curved, light still follows the curved space version of a straight line, called a *geodesic*.)