Answers

2015-11-25T08:38:10+08:00

no these two don't have mass because they are not matter these are forms of energy
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2015-11-26T17:31:32+08:00
The first point to make is that while photons (little packets of lightenergy) do not have mass, they do have momentum, and a change in momentum yields a force, so in actual fact light is able to physically interact with matter
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