A) 5
B) 3
C) 7
D) 3
Correct Answer: A
Solution :
In YDSE, path difference \[\Delta x=d\sin \theta \] For maxima, \[\Delta x=n\lambda \] where\[n=0,\pm 1,\pm 2,...\] \[\frac{5\lambda }{2}\sin \theta =n\lambda \]as\[\theta <1\]\[\Rightarrow \frac{2n}{5}\le 1\Rightarrow n\le \frac{5}{2}\] i.e. n can have values\[~0,\pm 1,\pm 2\] so total 5 maximas.You need to login to perform this action.
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