The Hale telescope of Mount Palomar has a diameter of 200 inch. What is its limiting angle of resolution for 600 nm light ?

Explanation

Here, a = 200 in = 200 × 2.54 cm = 508 cm = 5.08 m
`lamda=600 nm=600 times10^-9m=6.00 times10^-7 m`
`Deltatheta=1.22(lamda/a)=1.22 ((6.00 times10^-7m)/5.08 m)`
`1.44 times10^-7 rad`