If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central maximum is 30° in a single slit diffraction pattern recorded using 628 nm light, then the width of the slit is μm.

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6. Using small angles, minima are at θₙ = (nλ)/a on either side. Separation = (2λ)/a + (3λ)/a = (5λ)/a = 30° = π/6. a = (30λ)/π = (30×628×10⁻⁹)/(3.14) = 6×10⁻⁶ m. a = 6 μm. → 6

If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central maximum is 30° in a single slit diffraction pattern recorded using 628 nm light, then the width of the slit is ______ μm.

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