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

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The limit of resolution of a microscope is given by $Δ d = \frac{1.22 λ}{2 μ sin θ}$

$Δ d \propto λ$

$\frac{Δ d _{1}}{Δ d _{2}} = \frac{λ _{1}}{λ _{2}}$

$\frac{0.1}{Δ d _{2}} = \frac{6000}{4800}$

$Δ d_{2} = 0.1 \times \frac{4800}{6000} = 0.08 mm$

Answer: 0.08 mm .

Physics - Geometrical Optics Question with Solution | TestHub

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