NEET · Physics · STD 12 - 10. Wave optics
If the monochromatic source in Young's double slit experiment is replaced by white light, then
- 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 & Solution
Correct Answer
(B) There will be a central bright white fringe surrounded by a few coloured fringes
Step-by-step Solution
Detailed explanation
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 \(\beta=\frac{\lambda D}{d}\). Therefore, other fringes will be coloured.
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