MHT CET 2023 Physics question
In Young's double slit experiment, green light is incident on two slits. The interference pattern is observed on a screen. Which one of the following changes would cause the observed fringes to be more closely spaced?
Answer: (B)
Solution
Fringe width is , so closer fringes need smaller , smaller or larger . Blue light has a shorter wavelength than green, so decreases, option (b). Option (a): reducing
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