Assume that light of wavelength `6000 Å` is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100 inch ?

Options

A. `3 xx 10^(-3)` rad
B. `4 xx 10^(-3)` rad
C. `5 xx 10^(-5)` rad
D. `6 xx 10^(-9)` rad

Answer

A

Explanation

Limit of resolution of telescope.
`d theta = (1.22 lambda)/(D) = (1.22 xx 6 xx 10^(-7))/(254)`
`d theta = 2.9 xx 10^(-7)m`