Question

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

Options

• 10⁶ rad

• 10^-2 rad

• 10^-4 rad

• 10^-6 rad

Answer 1

The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 Å is of the order of 10^-6 rad.

Explanation:

Angular resolution dθ = `(1.22  lambda)/"a"`

dθ = `(1.22 xx 5000 xx 10^-10)/(10 xx 10^-2)`

dθ = 6.1 × 10^-6 rad