Which of the following is a proof that light travels in a straight line ? About the ligth, it is travelling in straight line, its speed = the time of the light’s turn, and so on …
In the small body frame, light is a particle called a photon.
It is easy to understand why light travels in a straight line: the particle just moves and keeps its motion through inertia.
There is no reason to change direction because there is no force to deform it.
Light waves constitute electromagnetic field interference and move.
When two disturbances intersect, they add up. However, this perturbation oscillates between positive and negative values, so when they are added, they can also cancel each other out. A straight line is the shortest method.
This is also the fastest path for rays that always travel at the same speed. All other paths are long, so rays using this path will be delayed. The light in the wave frame is really meaningful only when you think that the light source emits a set of rays in a larger full beam.
Conclusion – Which of the following is a proof that light travels in a straight line ?
Light rays passing through a path that is not a straight line will eventually dissipate completely due to interference. Only light rays passing through straight lines are retained.
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