Two points separated by a distance of 0.1 mm can just be seen in microscope when light of wavelength 6000 Å is used. If the light of wavelength 4800 Å is used, the limit of resolution will become (a) 0.8 mm (b) 0.12 mm (c) 0.10 mm (d) 0.08 mm

Answer: (d). Limit of resolution of a microscope d = (1.22λ)/(2nsin θ) ∝ λ. d' = 0.1 × (4800)/(6000) d' = 0.08 mm So the answer is (d) 0.08 mm.

Two points separated by a distance of 0.1 mm can just be seen in… | MHT CET 2024 (2 May, Shift 2)

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Resolving Power

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

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Answer: (d)

Limit of resolution of a microscope $d = \dfrac{1.22\lambda}{2n\sin\theta} \propto \lambda$ .
$d' = 0.1 \times \dfrac{4800}{6000}$
$d' = 0.08$ mm
So the answer is (d) 0.08 mm.

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