The spectral spear or sword of light, created by a convergent lens; can truthfully be called the photonic tunnel of time.

The reason is; that the spin of photons is the cause of the motion of gravitation; and the resulting creation of the attraction of matter into a mass; and mass is the evidence of the passage of time. The main travelers through the tunnel of time are photons of our visible spectrum.

Anything that is a thing is made up of particles. A photon has only one axis of spin; unlike an atom, which has multiple parts and therefore multiple axises of spin direction. A photon can reach and maintain the speed of light; and maintain its stability and existence. An atom having multiple axises of spin; cannot reach or sustain its existence; at speeds approaching the speed of light; it disintegrates. That is why the speed of light is not possible for spacecraft. That is why the photon of light is the only thing capable of the speed of light; and it’s time travel. Through the lens focused spear or tunnel of time.