Pilot wave theory can be used to explain the double slit experiment, and how mirrors can reflect photons as perfectly as they do.

Scatter

Pilot waves help smooth out minor irregularities by providing a cushion to tiny particles like photons.

Was it not for pilot waves, photons would scatter all over the place in their interaction with mirrors. Because photons are far smaller than the atoms found in the surface of mirrors.

Pilot wave smoothing out the interaction between a photon and a lattice of reflecting atoms

The ability of the pilot wave to smooth out interactions between photons and atoms can also be used to explain the behavior of light passing through a transparent medium.

The slalom analogy used in my book becomes a whole lot less eccentric once pilot waves are taken into account.

Pilot waves as guides

From experience we know that light can either reflect off of a transparent surface, or pass through it. The effect we get depends on the angle of the light as it hits the surface.

Light hitting a transparent surface at a slant angle will reflect. Because pilot waves provide enough resistance to send the incoming photons back out.

However, light hitting a transparent surface at an acute angle passes through the medium. Because pilot waves will in this case find ways to break through the lattice.

Pilot waves guiding red photons through a transparent lattice

The pilot wave deforms in the process. However, it does not loose its ability to smooth out minor irregularities. Each photon slaloms through the lattice with a pilot wave to guide it.

Red and blue photons

Red photons have smaller pilot waves than blue ones. So, they can slalom more directly through the lattice than the blue photons. They get through the lattice quicker than blue photons due to their shorter paths.

This also explains why very low energy photons do not pass through glass. Because low energy photons don’t have the momentum required to push their pilot waves through the lattice. So, they are instead reflected.

Very high energy photons, on the other hand, can be stopped by adding led to the lattice. Because led atoms makes the slalom path narrower. So, high energy photons crash due to their need for more space between atoms than what is provided.

Conclusion

Once pilot waves are taken into account, it becomes easier to explain why glass is perfectly transparent only for photons within a specific energy range.