The reason why we see white light is because we see all the light in the visible lights spectrum. So let's say I have a light bulb that gives out white light, the reason why it gives out light its because it keeps emitting a constant amount of energy. By E = hv, we should only be able to see one kind of light. ( for instance, the energy emitted by light is 100 J and the frequency of the light wave should be 100/h, which means one kind of light) So why can we still see white light? What is wrong with my concept? Thanks a lot!