MHT CET 2025 Physics question
In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2 m away from the lens. If the distance between the first minimum on either side of the central maximum is 1 cm, the wavelength of light used is
Answer: (C)
Solution
The first minimum satisfies , so its distance from the centre is . The separation of the first minima on both sides is m. Hence
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