Light DOES have mass. That would be why NASA designed spacecraft with light-sails. That can only work because light exerts (miniscule, but non-zero) pressure when it strikes an object. In other words, it transfers kinetic energy. Therefore, it has mass. Also, if light had no mass, it would be unaffected by gravity, and black holes wouldn't be black, they'd be blindingly bright.
@Anastasia_616: But what about Einstein's e=mc^2? Energy is mass multiplied with lightspeed-sqare.
also in real life light is a wave, it has no mass therefore isnt matter, so it must be energy and energy is a wave
i would like to see either of you shut the fuck up
Yeah, tttwwy, i'd like to see YOU use real photons for something like this.
particle/wave duality to the rescue
@tttwwy: Really? Than name me that guy that can make neutrons out of photons, or explain me what vibranium for an element is. Otherwise stop criticize the realism of my saves.