Q 12-09-127JEE MainJEE Main 2023 (8 Apr, Shift 1)Easy
In a reflecting telescope, a secondary mirror is used to
Answer: (C) move the eyepiece outside the telescopic tube
The secondary mirror redirects the converging rays out of the tube (to the side, or through a hole in the primary), so that the eyepiece and observer do not sit inside the tube blocking the light.
Solution by Sreeraj P, M.Sc Physics