Q. The angular resolution of a 10 cm diameter telescope at a wavelength of $\ 5000\mathring{\mathrm{A}}$ is of the order of
A) $10^{6}\ rad$
B) $10^{- 2}\ rad$
C) $10^{- 4}\ rad$
D) $10^{- 6}\ rad$
Explanation
(d) Angular resolution $= \frac{1.22\lambda}{d}$
$= \frac{1.22 \times 5000 \times 10^{- 10}}{10 \times 10^{- 2}} = 6.1 \times 10^{- 6}$
$\approx 10^{- 6}\ rad$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.