Photons, which are particles of light, do not have a rest frame. In the theory of special relativity, the concept of rest frame applies only to objects with mass. Since photons are massless particles, they always travel at the speed of light (c) in all reference frames.
From the perspective of a photon, its travel time is instantaneous. In other words, if a photon could somehow have its own reference frame, it would perceive itself as stationary and the entire universe moving around it. However, this is a hypothetical scenario, as photons do not have a rest frame or experience time as we do.
When we observe photons from our reference frame, we perceive them as moving because their speed relative to us is always the same, at the speed of light. From our perspective, photons can have different wavelengths, frequencies, and directions of travel, but their speed remains constant.
It's important to note that the behavior of photons is unique due to their massless nature. Objects with mass, such as electrons or macroscopic objects, have different properties and cannot reach or exceed the speed of light.