What are the photon/electron consequences of matter in a gravitational time dilation?

Due to gravitational time dilation, for an observer of the planet, the frequency of electromagnetic radiation would be slower. Visible light emitted from the planet would appear as infrared or micro-waves. The amplitude of the radiation would not change. Since frequency decreases while amplitude remains constant, the radiometer would receive less cumulative energy and would spin slower. I do not believe there would be any change in the rate at which an atom absorbs a photon. The speed of light is infinitely faster than mass can travel. Objects inside a massive gravity well absorb photons the same way objects in open space do.