MHT CET 2025 Physics question
In a biprism experiment a steady interference pattern is observed on the screen using a light of wavelength 5000 Å. Without disturbing the set up of the experiment, the source of light is replaced by a source of wavelength 6400 Å. The fringe width will
Answer: (D)
Solution
Fringe width ; with D and d unchanged (set-up undisturbed), . So . The new fringe width is 1.28 times the old
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