According to our current understanding of physics, electromagnetic waves, such as light, do not travel through time in the sense of moving backward or forward in time. Electromagnetic waves propagate through space at a constant speed, known as the speed of light, which is approximately 299,792,458 meters per second in a vacuum.
The concept of time travel involves moving through time, which would require a different framework beyond our current understanding of physics. While there have been various theoretical models and discussions about the possibility of time travel, no practical method has been discovered or proven to allow for the direct manipulation or travel through time.
It's worth noting that there are interesting phenomena in physics, such as time dilation, where time can appear to pass at different rates depending on relative motion or gravitational fields. However, these effects are within the bounds of special and general relativity and do not enable actual time travel in the conventional sense.
It's important to keep in mind that scientific understanding evolves over time, and future advancements may bring new insights into the nature of time and the possibilities of time travel.