Assume that light of wavelength 600nm600 nm600nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2m2 m2m is :
3.66×10−7rad3.66 \times 10^{-7} rad3.66×10−7rad
1.83×10−7rad1.83 \times 10^{-7} rad1.83×10−7rad
7.32×10−7rad7.32 \times 10^{-7} rad7.32×10−7rad
6.00×10−7rad6.00 \times 10^{-7} rad6.00×10−7rad
θR=1.22λd\theta_R = 1.22 \frac{\lambda}{d}θR=1.22dλ; λ=600×10−9m\lambda = 600 \times 10^{-9} mλ=600×10−9m, d=2md = 2 md=2m. θ=1.22×600×10−92=3.66×10−7rad\theta = \frac{1.22 \times 600 \times 10^{-9}}{2} = 3.66 \times 10^{-7} radθ=21.22×600×10−9=3.66×10−7rad
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