i was going through the standard proof of Young's experiment using electric field concept .what the proof did is took two source [itex]S_{1}[/itex] and [itex]S_{2}[/itex] in the same line(asuuming such points do exist) and took a point [itex]P[/itex] in the same plane as those points and found out the field at the point .(adsbygoogle = window.adsbygoogle || []).push({});

1.Was this done assuming hugyen's principle that is the points on the slit behave as secondary wavelets .otherwise i don't find reason why there are 'two' fields at the same place due to one source(the one which emits light actually)

2. also doesn't the condition that fr each point A in slit 1 there exista a point B in slit 2 which lies on the vertical drawn from B guarantee that they are of same length geometry...t's like a bijective function from one set to other

3.also why do we take point which lie in plane with the point P only to calculate the net field why not the contributions due to others

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# Young's Double slit Experiment

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