Question
If the monochromatic source in Young's double slit experiment is replaced by white light, then
NEET
Physics
Wave Optics
2024
NEET 2024
NEET Physics Question (2024) — Solution
Options
- A. There will be a central dark fringe surrounded by a few coloured fringes
- B. There will be a central bright white fringe surrounded by a few coloured fringes
- C. All bright fringes will be of equal width
- D. Interference pattern will disappear
Answer
B. There will be a central bright white fringe surrounded by a few coloured fringes
Step-by-step solution
At central point on screen, path difference is zero for all wavelength. So, central bright fringe is white and other fringes depend on wavelength as = D d . Therefore, other fringes will be coloured.
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