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CBSE Class 12-science Answered

In young's double slit experiment,using light of wavelength 400nm,interference fringes of width 'X' are obtained.The wavelength of light is increased to 600nm and the separation between the slits is halved.If one wants observed fringe width on the screen to be same in the two cases,find the ratio of distance between the screen and the plane of the interfering sources in the two arrangements?
Asked by SUHAS MELMURI | 14 Nov, 2013, 05:23: AM
answered-by-expert Expert Answer
Answered by Faiza Lambe | 14 Nov, 2013, 12:06: PM

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CBSE 12-science - Physics
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A parallel beam of light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. If the resulting diffraction pattern is observed on a screen 1 m away, find the distance of (i) First minimum, and (ii) Second maximum, from the central maximum. 
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CBSE 12-science - Physics
if separation between the two slits is increased till fringes are observed then what will happen to angular separation of fringes (my thought is here  fringes are not observed  and they are increasing till fringes show up ...so until then what will happen to angular width if we increase d-slit separation..does angular width increases or remains same  
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