Hi, I know without light, an object can't give out radiations thus, show no colour. So if we keep any object in a completly dark room, it would not exhibit colour. Suppose we send in a large amount of sound energy into the same room. The object in the room would absorb some amount of this sound energy. So the electrons get excited, come back to the ground level and emit radiations. So does this mean an object can show colour without photons stricking on them? Or am I just typing blunder? Thank you.