Mera Bharat Mahan

I think, metal surface is plane and paper surface is rough.

I read Wikipedia, and got reflection of mirror is specular and of white paper it is diffuse reflection. Should I dig a little deeper??

Then why metals are used for making mirrors??

What is contribution of free electrons in reflection??

I am taught that when atom receives energy i.e it is incident with EM wave it absorbs it and then releases it. You can not tell in what direction the EM wave will go. Mirror is too made up of some kind of atoms. So what makes them to make angle i = angle r ?? And releasing all EM waves same as it has received??

I like to read about light. But when mathematical part comes I simply skip it. I don't know how people understand it. I just like thinking(without calculation) and that is when this question come to my mind. I was actually looking for an answer which contained step by step process like photon comes then hits the atom then atom absorbs it, like that. Still your answer is fully appreciated. No doubt about that. I am not good at english so i can't fully tell you what i think. I am 100% greatfull to each answerer. Especially of studiot. I am telling this because my language might represent i am rude or anything. i don't know. so, can you please try to tell the step by step procedure?? Your previous answer is not waste at all, like i have mentioned above. I am asking you answer in this way because i am a guy who prefers to imagine than doing maths etc. So please...

hmm..... thank you... does a photon reacts in same manner with wall of atoms??

yes!! that is what I am being tought in class for last 3 days. go on...

I didn't say I don't want math. I said it because I won't understand it. Please explain this.

can you please elaborate??

That's my only question. I am a newbie here, so I don't know if this is the right section to post this question. I am expecting a non-mathematical answer with minimum science terminologies, as I won't understand it at all. If an atom is hit by a photon, its electron excites and changes its shell and then again falls back to its previous shell, giving a photon. My question is, why the given out photon goes in perfect opposite direction of the incident photon to make angle i = angle r.