MHT CET202019 Oct 2020Evening ShiftPhysicsRay OpticsActual
By increasing the aperture of the objective lens, wavelength of light, focal length of the objective lens and the resolving power of an astronomical telescope respectively
Options
- Ais not affected, increases, decreases.
- Bincreases, decreases, is not affected.
- Cdecreases, increases, is not affected.
- Dis not affected, decreases, increases.
Correct answer
B. increases, decreases, is not affected.
Step-by-step solution
(A) Resolving power of the telescope RP = a 1.22 where a is the diameter (aperture) of the objective lens. RP a Thus the aperture of the objective lens is made so large so as to increase the resolving power of the telescope.