Functional principle - the secret of the miracle

One side of the book is coated with photon reagent material that starts to shine with the light of a given wavelength because the light fills the surface with energy.

The resulting energy surplus is lost during a process with a reduced light phenomenon, which takes much longer than energy absorption in time.

The photon filter film of the given wavelength-resistant coating prevents the area behind it from getting energy. So these areas will not light up.

But it was really exciting thanks to Einstein. He laid the foundations for laser operation. With a special frequency laser, you can also transmit energy from far away to illuminate the affected area. Because of the parallel beam of the laser, only the point of impact of the laser beam gets enough energy to illuminate it. Only the part that starts touching the laser beam begins to light up.