In the case of black holes, lights are pulled into by great gravitational force exerted by the dying stars (which forms into a black hole). If light has no mass, how is light affected by gravity?
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It’s like a Dragon Ball Z spirit bomb. It has no physical form but it sure does have a lot of energy in it. You can still interact with it, move it around, and if you drop it will fall to the earth. Because the force of the earth will still attract the force of that energy.
Even shorter they are different forms of the same thing.
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