A) 3/4 cm
B) 4 cm, 5cm
C) 2/3 cm, 2/5 cm
D) 4/3 cm, 5/3 cm
Correct Answer: C
Solution :
[c] Path difference \[\sqrt{{{D}^{2}}+{{d}^{2}}}-D=1cm\]. Also, \[[\sqrt{{{D}^{2}}+{{d}^{2}}}-D]=(2n-1)\frac{\lambda }{2}\Rightarrow \lambda =\frac{2(1)}{2n-1}\] For n= 1, 2, 3.................... \[\lambda =2cm,\,\frac{2}{3}cm,\,\frac{2}{5}cm,\,\]................
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