A) \[5.1\times {{10}^{-4}}m\]
B) \[5.1\times {{10}^{4}}m\]
C) \[5.1\times {{10}^{-4}}mm\]
D) \[10.1\times {{10}^{-4}}cm\]
Correct Answer: A
Solution :
[a] \[d=\frac{D\lambda }{\beta }\] ...(i) According to question, \[\lambda =5100\times {{10}^{-10}}m\] \[\beta =\frac{2}{10}\times {{10}^{-2}}m\] ...(ii) D=2m, d=? From eqs. (i) and (ii) \[d=\frac{2\times 51\times {{10}^{-8}}}{2\times {{10}^{-3}}}=5.1\times {{10}^{-4}}m\]You need to login to perform this action.
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