Why does a black hole draw light even though there is no mass of light?
1. Light rest month 0.
2. Light is never static, it is mass from its relativity in the moving state. Nowadays mass is not separately but momentum.
3. But it would be wrong to say that the black hole pulls light because of this mass. The matter of tension comes from Newton's law of gravitation. That thing doesn't work in many extreme situations. Then you have to use general relativity. That applies in all cases.
4. Gravity is not a force according to general relativity, the curvature of space-time. Whoever falls into that curvature will follow that curvature. The light will too.
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