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1. I think we can take photon as light. Its mass=0, acceleration=0, charge=0.

By eqn F=ma=0*0=0 i.e any particle with or without mass cannot impel force on a photon.

From Newtons third law vice versa is also true.

I think force between particles (attraction or repulsion) represents their interaction with

each other.

Then what is this absorption of photon i.e interaction by jumping electrons(containing mass) actually mean.

2. When a photon is released,

is its speed is instantaneous with a speed of light?? If it is instantaneous could you tell

me, how does it attain that speed from the start i.e at t=0.

If its not instantaneous, Is photon accelerating for its first second to attain the speed of

light, since speed is 3*10^8 m for each second , and then it continued to travel with no

acceleration after t=1.

I don't know the physics too deep. I just know the basics. I am trying to learn into its depths. So please notify me if there are any wrong in my questions.