There is no such thing as an observer traveling with a photon. Photons don’t have experiences.

The temperature of the medium and the sound waves are directly proportional to each other. Therefore, as the temperature increases, the speed of sound increases.

Sound waves travel faster and more effectively in liquids than in air and travel even more effectively in solids. This concept is particularly hard to believe since our general experiences lead us to hear reduced or garbled sounds in water or behind a solid door.

Photons are massless, and massless particles move at the speed of light regardless who is watching them. This is quite tricky to understand, but that’s the way nature works. You cannot travel alongside a photon and see it standing still, it will always travel at c, no matter what.

27 Dimensions

Photons are easily created and destroyed. The movement of electrons is responsible for both the creation and destruction of the photons, and that’s the case for a lot of light production and absorption. An electron moving in a strong magnetic field will generate photons just from its acceleration.

The particles that make up light, photons, may live for at least 1 quintillion (1 billion multiplied by 1 billion) years, new research suggests. If photons can die, they could give off particles that travel faster than light. Many particles in nature decay over time.

However, two photons heading towards each other can indeed collide indirectly. A photon can spontaneously degenerate into a particle with mass and its antiparticle in a process known as pair production. In this process, the energy of the photon is completely transformed into the mass of the two particles.