A) 0.2 m
B) 0.4 m
C) 0.6 m
D) 0.8 m
Correct Answer: B
Solution :
Initially S1M = S2M Þ Path Difference (Dx) = \[{{S}_{1}}M-{{S}_{2}}M=0\]. Finally when the box is rotated Path Difference \[={{S}_{1}}M'\,-{{S}_{2}}M'\] Þ \[\Delta x=5-3=2m\] For maxima Path Difference = (Even multiple)\[\frac{\lambda }{2}\] Þ \[\Delta x=(2n)\frac{\lambda }{2}\] For 5 maximum responses Þ \[2=2(5)\frac{\lambda }{2}\] \[\left\{ \because \Delta x=(2n)\frac{\lambda }{2} \right\}\] Þ \[\lambda =\frac{2}{5}=0.4m\].You need to login to perform this action.
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