Question

what is photochemical reactions​

Answer 1

The reaction that occurs with the absorption of light is called a photochemical reaction.

Answer 2

$\bold \pink{photochemichal \: reaction}$

Photochemical reaction, a chemical reaction initiated by the absorption of energy in the form of light. The consequence of molecules absorbing light is the creation of transient excited states whose chemical and physical properties differ greatly from the original molecules.