MHT CET 2026 Physics question
Light of wavelength 580 nm is incident normally on a slit of width 'a'. The distance between slit and screen is 2.5 m and the distance of the second order maximum from the centre of the screen is 14.5 mm in a diffraction pattern. The value of 'a' is
Answer: (B)
Solution
For single-slit diffraction, the th secondary maximum lies at , so on the screen . For the second order maximum (): . Then \frac{5λ D}{2y}\frac10^{-9}$×
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