Questions
A screen is placed 50cm from a single slit, which is illuminated with 6000 light. If distance between the first and third minima in the diffraction pattern is 3mm, the width of the slit is
detailed solution
Correct option is B
Position of nth minima yn=nλDd⇒y3−y1=λDd(3−1)=2λDd⇒3×10−3=2×6000×10−10×0.5d⇒d=0.2×10−3m=0.2mmTalk to our academic expert!
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In Fraunhoffer diffraction pattern width of central bright fringe is . If wavelength of light is doubled and slit width is halved, distance of second dark fringe from the centre of central bright fringe is
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