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## Main Question or Discussion Point

If they do:

-Do the collisions obey newton's law of motion.

If they don't, why?

What is the difference between a real particle and photon ?

-We know that they both got mass ( photons have relativistic mass E/c^2).

What is the significance of this mass? What does it imply?

Any help will be highly appreciated. Thx

-Do the collisions obey newton's law of motion.

If they don't, why?

What is the difference between a real particle and photon ?

-We know that they both got mass ( photons have relativistic mass E/c^2).

What is the significance of this mass? What does it imply?

Any help will be highly appreciated. Thx

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