Question

Assume that light of wavelength $600 \mathrm{~nm}$ is coming from a star. The limit of resolution of telescope whose objective has a diameter of $2 m$ is :
(A) $3.66 \times 10^{-7} \mathrm{rad}$
B $1.83 \times 10^{-7} \mathrm{rad}$
C $7.32 \times 10^{-7} \mathrm{rad}$
D $6.00 \times 10^{-7} \mathrm{rad}$

Answer 1

Solution:
$$\begin{aligned} &\text { Limit of resolution, } \\ &\theta_{R}=1.22 \frac{\lambda}{d} ; \\ &\lambda=600 \times 10^{-9} \mathrm{~m} \\ &d=2 \mathrm{~m} \\ &\theta_{R}=\frac{1.22 \times 600 \times 10^{-9}}{2} \\ &\theta_{R}=3.66 \times 10^{-7} \mathrm{rad} \end{aligned}$$

Answer 2

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Answer 3

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