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7 Apr 2010 22:27:57 IST
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So what to do now is that you remove some more part of the mirror!!! do it carefully, by removing the silvering of the mirror in carefully chosen points so that the new "sum total path difference" from the source to the reflecting points to the image is ZERO...... this is a diffraction grating!!! What you achieve is that you weed out those reflected EMWaves which contribute towards a net path difference..... In effect,you have broken the mirro into smaller pieaces AND carefully adjusted the position of those mall pieces (since u are not allowed to move things here, u just pick the silvering) .... You adjust the net path differene to be zero, and you get an image!!!Do I need to put up a pic? (its a weary job u knw ;-P)
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7 Apr 2010 22:30:44 IST
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no, it is clear now, amazing answer
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7 Apr 2010 22:33:11 IST
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Can you tell me how the photons interact with the atoms on the surface? can this be explained with the wave theory also?
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7 Apr 2010 22:35:57 IST
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Who would have thought that u were talking about diffraction grating, Well nice question.
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7 Apr 2010 22:37:05 IST
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@deepak: thnx... :-) plz check ur nudgebuk.. i have doubt on an answer..
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7 Apr 2010 22:40:01 IST
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@xeonax:: Thnx .. ur pic was well timed! ... cud u plz go thru deepak's nudgebuk.. i have a doubt abt which i have posted smwthing... i havnt had a satisfactory explanation to that...
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7 Apr 2010 22:40:46 IST
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Can we put sumthin on this mirror, like water.if we can we can use the concept of total internal reflection, (since u said we can form a image with only one ray.
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7 Apr 2010 22:44:58 IST
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@yasin post the question here i dont have it
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7 Apr 2010 22:52:14 IST
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@deepak: Actually I have read that in modern quantum optics, light is considered particles in the best sense... "Quantum Electrodynamics"... (of which feynman was hmself a pioneer) .. ecxplains all these things in terms of photon behaviour... and since i got this in a buk of that subject, i am not sure if it can be explained by wave theory satisfactorily.. (I'll search a bit and then discuss this)..... Infact I am still reading the book.. so maybe i will have better understandging after completing... You can ask anyone who has read it full or similar such stuff..
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7 Apr 2010 23:07:22 IST
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what is that line b/t source and image showing
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7 Apr 2010 23:25:00 IST
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@xeonax: I'll post it tomorrow... i'm too weary to draw th pic today! thnx neway!@akshay: well extra things are a no-no in this question. That includes water! And if u try for total internal reflection, i can;t make out how u will use the mirror ... u HAVE to use the remianing portion of the mirror! ... but plz elaborate a bit...since the question is now answered, u can post how u propose to use water... we cud all benefit.... and i thnk i shud remind we only assume the one-ray image thing for this question!! otherwise, that is a technical mistake (like I did in my frst post :-P)@akansha: It is a small barrier to ensure that light does not travel directly to the source point to the image point. If light went that way, there would be no reason we would bother with a scratched mirror at all :-P
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