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STD 12 - 10. Wave optics — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 10. Wave optics4 Marks
MCQ
In a Young's double slit experiment if there is no initial phase difference between the light from the two slits, a point on the screen corresponding to the fifth minimum has path difference
  • A
     $5 \frac{\lambda}{2}$
  • B
     $10 \frac{\lambda}{2}$
  • ✓
     $9 \frac{\lambda}{2}$
  • D
    $11 \frac{\lambda}{2}$
✓

Answer

Correct option: C.
 $9 \frac{\lambda}{2}$
c
Path difference for $n^{\text {th }}$ minima $=(2 n-1) \frac{\lambda}{2}$

For fifth minima $(n=5)=\frac{9 \lambda}{2}$

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