Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2m is:

Options

A. `3.66 xx 10^(-7) `rad
B. `1.83 xx 10^(-7)` rad
C. `7.32 xx 10^(-7)` rad
D. `6.00 xx 10^(-7)` rad

Answer

A

Explanation

`theta_(R ) = 1.22 (lambda)/(d) , (lambda = 600 xx 10^(-9) m, d = 2m)`
`= (1.22 xx 600 xx 10^(-9))/(2)`
` theta = 3.66 xx 10^(-7)` rad.