MHT CET202526 Apr 2025Morning ShiftPhysicsWave OpticsActual
The ratio of the distance of n ^ th bright band and m ^ th dark band from the central bright band in an interference pattern is
Options
- An: m
- Bm: n
- Cn: (m- 1 2 )
- D(n- 1 2 ): m
Correct answer
C. n: (m- 1 2 )
Step-by-step solution
The distance from the central bright band to the n th bright fringe is x_n = n D d , while the distance to the m th dark fringe is x_m = (m - 1 2 ) D d . The ratio between these distances simplifies to x_n x_m = n m - 1 2 , yielding n : (m - 1 2 ) . This corresponds to option C .