STANDARDPhysics-Wave Optics
STANDARD Physics Double Slit Interference MCQ Question
Type: MCQ-numerical-Medium-Class 12
The two slits are 1 mm apart from each other and illuminated with a light of wavelength 5 × 10⁻⁷ m. If the distance of the screen is 1 m from the slits, then the distance between third dark fringe and fifth bright fringe is
A
1.2 mm
B
0.75 mm
C
1.25 mm
D
0.625 mm
Correct Answer
Option C
Detailed Explanation
The distance between the third dark fringe and the fifth bright fringe is calculated using the formula for fringe separation. For the third dark fringe, n = 3, and for the fifth bright fringe, n = 5. Using the formula, the distance is found to be 1.25 mm.
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