The angular resolution of a `10cm` diameter telescope at a wavelength `5000Å` is of the order

Options

A. `10^(6) ` rad
B. `10^(-2)` rad
C. `10^(-4)` rad
D. `10^(-6) ` rad

Answer

A

Explanation

R . P `= 1 // Delta theta`
The angular resolution,
`Delta theta = (1.22 lambda)/(D)`
`= (1.22 xx 5000 xx 10^(-8))/(0 .1) = 6 . 1 xx 10^(-4) = 10^(-4)`