In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is 5 mm . The screen on which the diffraction pattern is obtained is at a di

Question

In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is 5 mm . The screen on which the diffraction pattern is obtained is at a distance of 80 cm from the slit. The wavelength used is 6000 A ˚ . The width of the silt is

TestHub · Accepted Answer

​ Distance between the first minima on both side = a 2 λ D ​ = 5 × 1 0 − 3 m a 2 × 6 × 1 0 − 7 × 0.8 ​ = 5 × 1 0 − 3 ∴ a = 5 × 1 0 − 3 2 × 6 × 1 0 − 7 × 0.8 ​ = 0.192 × 1 0 − 3 m = 0.192 mm ​

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