A) \[0.1mm\]
B) \[0.2mm\]
C) \[0.3mm\]
D) \[0.4mm\]
Correct Answer: C
Solution :
\[e\sin \theta =\lambda \Rightarrow \sin \theta \approx \theta =\frac{\lambda }{e}\] \[\therefore \] \[x=f\theta =\frac{f\lambda }{e}\] \[\therefore 2x=\]separation between minima on either side of central maximum \[=\frac{2f\lambda }{e}\] \[\therefore \] \[e=\frac{2f\lambda }{2x}\] \[=\frac{2\times 1\times 600\times {{10}^{-9}}}{4\times {{10}^{-3}}}\] \[=0.3\,\,mm\]You need to login to perform this action.
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