Question

what is the role of decomposition reaction in photography

Answer 1

decomposition reaction play a most important role here it goes
1) in decomposition reaction energy is supplied either in the form of heat light or electricity and these energy breaks down the compound
2) in photography AgCl breaks into Ag and Cl thus helping in photography
hope it helps

Answer 2

i) The decomposition energy is supplied either in the form of heat,light and electricity and these energy breakdown the compounday
ii) in photography in AgCl breaks in Ag and Cl thus helping in photography.