Question

The diameter of an object lens of a telescope is $5m$ and wavelength of light is $600A$. The limit of resolution of this telescope is

Answer 1

The diameter of an object lens of a telescope is $=5m\left(d\right)$

Wave length of light $=600A=\lambda =600\times {10}^{-10}m=\lambda$

The limit of resolution of this telescope$=?$

Solution

Formula of limit of resolution

$=\frac{1.22\lambda }{a}\times \frac{180°}{\pi }\left(indegree\right)=\frac{1.22\times (600\times {10}^{-10})}{5}\times \frac{180}{11}=8.3\times {10}^{-7}sec$