Question:
A Galilean telescope is $27 \mathrm{~cm}$ long when focused to form an image at infinity. If the objective has a focal length of $30 \mathrm{~cm}$, what is the focal length of the eyepiece?
Solution:
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.