BITSAT2023PhysicsRay OpticsActual
In a reflecting telescope, a secondary mirror is used to:
Options
- Areduce the problem of mechanical support
- Bremove spherical aberration
- Cmake chromatic aberration zero
- Dmove the eyepiece outside the telescopic tube
Correct answer
D. move the eyepiece outside the telescopic tube
Step-by-step solution
(d) To redirect the light that enters the telescope to the eyepiece or camera. The primary mirror of a reflecting telescopes gathers the light and reflects towards the secondary mirror which then reflect the light towards the eyepiece allowing the observer to see image. It has advantage of a large focal length in a short telescope.