According to the question: 
θ=a1.22λ∴Dd=aλ⇒a′=aλDa=10×10−25000×10−10×103=5 mm
A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometers from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000A˚, is of the order of:
Held on 30 Apr 2004 · Verified 9 Jul 2026.
0.5 m
5 m
5 mm
5 cm
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Work through every NEET UG Optics PYQ, year by year.