Q. The diameter of the objective lens of a telescope is $5.0\ m$ and wavelength of light is $6000\ \mathring{\mathrm{A}}$. The limit of resolution of this telescope will be
A) $0.03\ sec$
B) $3.03\ sec$
C) $0.06\ sec$
D) $0.15\ sec$
Explanation
(a) Limit of resolution $= \frac{1.22\ \lambda}{a} \times \frac{180}{\pi}\ $(in degree)
$= \left( \frac{1.22 \times \left( 6000 \times 10^{- 10} \right)}{5} \times \frac{180}{\pi} \right)^{o} = 0.03\ sec$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.