The first thing that surprised me when I took up the experiments was that light not only bends around an obstacle, but also repels from it. The books confirmed what had previously slipped past consciousness. The edge scatters light in all directions. Which is quite consistent with the hypothesis of a material beacon that sends out photons in the chosen directions.
Experience in interference from screens with different physical and chemical composition
Electromagnetic waves in antiphase. For convenience of presentation, only one component of the beam is shown
So friends, lets imagine that we took two single-color beams from good lasers and crossed them at a negligible angle (see Fig.). In antiphase. What should happen in this case?
The light will disappear.
Logically, this is how it happens. But physics is above linear logic. Moreover, it is even higher than higher mathematics. Material objects do not at all want to be added, subtracted and multiplied in some way. They are what they are. And with this, as well as with the temper of a capricious wife, given to you forever, in joy and sorrow, you have to put up with.
The measure of truth is a natural experiment. Therefore, having swayed a little, I proceed to physical experiments.
Classic experiment with diffraction
The addition of light waves. This is indicated in physics textbooks. At one angle, the waves add up in antiphase, creating darkness. At a different angle, they reinforce each other. In fact, the question of where the light will be and where the darkness will be is decided earlier. The lattice itself. Which is supposed to have many wonderful properties.