Question

The diameter of the object lens of telescope is 5.0 m and wavelength of light is 6000 A. The limit of resolution of this telescope is

• A. 0.15 sec
• B. 0.06 sec
• C. 0.03 sec
• D. 3.03 sec

Answer 1

Answer: (C)

0.03 sec

As we know,

Limit of resolution $=\frac{1.22\lambda }{a}\times \frac{180}{\pi }$ ( in degree )

$={(\frac{1.22\times (6000\times {10}^{-10})}{5}\times \frac{180}{\pi })}^o=0.03sec$