Limit of resolution of a telescope is given by,
ϑmin=a1.22λ, where λ is the wavelength of the light and a is the aperture diameter.
Given, λ=600nmanda=2m
ϑmin=21.22×6×10−7
⇒ϑmin=3.66×10−7rad
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is:
NEET UG 2020 — Physics Optics
2020mcqhard
Assume that light of wavelength 600nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2m is:
Official previous-year question
Held on 30 Apr 2020 · Verified 9 Jul 2026.
Options
- A
1.83×10−7rad
- B
7.32×10−7rad
- C
6.00×10−7rad
- D
3.66×10−7rad
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