Calculate the limit of resolution of a telescope objective having a diameter of a 200cm, if it has to detect light of wavelength 500 nm coming from a star.

Engineering

Physics

Optical Instrument

Question

305 × 10^–9 radian

152.5 × 10^–9 radian

610 × 10^–9 radian

457.5 × 10^–9 radian

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Limit of resolution of telescope $= \frac{1 .22 λ}{D}$

$θ = \frac{1 .22 \times 500 \times 10^{- 9}}{200 \times 10^{- 2}} = 305 \times 10^{- 9} radian$