Question

give reason photographic plates affected by light

Answer 1

It is the energy in each photon of lightthat causes a chemical change to thephotographic detectors that are coated on the film. ... For example, specially formulated plastics can be hardened (cured) by exposure to ultraviolet light, but exposure to visible light has no effect.

Answer 2

Infrared light is also invisible, but if it is strong enough our skin detects it as heat. It is the energy in each photon oflight that causes a chemical change to the photographic detectors that are coated on the film. ... When you get a sun tan, a photochemical reaction has caused the pigments in your skin to darken.