One example is a beam of high energy photons of light passing through a magnetic field.

Light is made up of small bundles of energy called photons.

For some directions of emission the negative energy photon will cross the horizon.

These are not quantum limits, but they are factors that make very high energy photons less common.

This means a higher energy photon, perhaps x-rays, rather than visible light.

High energy photons such as ultraviolet light and x-rays cannot be seen either.

Light is considered to be individual particles of energy called photons.

We put in comparatively high energy photons, which scatter off the molecule.

Does the statement imply negative energy photons or something of that nature?

However, for low energy photons there is greater gas interaction and the direct ionisation effect increases.