1.

Consider a Young’s double slit experiment as shown in figure.What should be the slit separation d in terms of wavelength λ such that the first minima occurs directly in front of the slit (S1)?

A. \(\frac{\lambda }{{2\left( {5 - \sqrt 2 } \right)}}\)
B. \(\frac{\lambda }{{\left( {5 - \sqrt 2 } \right)}}\)
C. \(\frac{\lambda }{{2\left( {\sqrt 5 - 2} \right)}}\)
D. \(\frac{\lambda }{{\left( {\sqrt 5 - 2} \right)}}\)
Answer» D. \(\frac{\lambda }{{\left( {\sqrt 5 - 2} \right)}}\)


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