Cold & Hot transition of light

[peps]

Can someone briefly explain the definition or the difference between a cold and hot transition of light?

Hot transition involves a change in an atoms vibration and standing wave patterns from absorbtion of higher frequency, such as skin sunburn from long exposures to ultraviolet light or physical change in food from microwave.

What are some examples and the process of cold transitions?

 

[Mentz114]

When light is absorbed by a leaf or some other green life, the energy is used to make chemical bonds and not heat. Also when light is absorbed in the eye, it causes neural impulses.