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Separation of the first secondary maxima for the two sodium lines 590 nm and 596 nm

The same question, asked 2 times: 9 May 2023 S1*, 14 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    9 May 2023 S1

    47
    Two wavelengths 590 nm and 596 nm of sodium light are used one after other, to study the diffraction taking place at a single slit of aperture 2.4 mm. The distance between the slit and screen is 2 m. The separation between the positions of first secondary maximum of the diffraction pattern obtained in the two cases is

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  2. Question 2

    14 May 2024 S2

    41
    Two wavelengths of sodium light 590 nm and 596 nm are used one after another to study diffraction due to single slit of aperture 2×10−6 m2 \times 10^{-6}\,\text{m}. Distance from slit to screen is 1.5 m. The separation between the positions of first maximum of the diffraction pattern in the two cases is

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