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Limit of resolution or resolving power of a microscope when the wavelength of light changes

The same question, asked 2 times: 2 May 2023 S2*, 18 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    2 May 2023 S2

    36
    Two points separated by a distance of 0.1 mm can just be seen in a microscope when light of wavelength 6000 Å is used. If the light of wavelength 4800 Å is used, the limit of resolution will become

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  2. Question 2

    18 Apr 2026 S2

    143
    In an optical instrument- microscope, the wavelength of light used are λ1=6800 A˚\lambda_1 = 6800\ \mathrm{\mathring{A}} and λ2=5100 A˚\lambda_2 = 5100\ \mathrm{\mathring{A}}. The ratio of the resolving power of microscope corresponding to 'λ1\lambda_1' to that for 'λ2\lambda_2' is

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