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Wavelength of light used in an optical instrument are λ1 = 4000 Å and λ2 = 5000 Å,

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Wavelength of light used in an optical instrument are λ1 = 4000 Å and λ2 = 5000 Å, then ratio of their respective resolving powers (corresponding to λ1 and λ2 ) is

(a) 16 : 25 

(b) 9 : 1 

(c) 4 : 5 

(d) 5 : 4.

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1 Answer

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Correct Option (d) 5 : 4.

Explanation:

Resolving power of an optical instrument is 

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