Reflector - light rays come in parallel Light is reflected by main mirror Objective mirror = main mirror Aperture Role of secondary mirror and location of observer.
(Reflector - light rays; come; L:in parallel Light) (Reflector - light rays; is reflected; by main mirror Objective mirror = main mirror Aperture Role of secondary mirror and location of observer)
Reflector - light rays Reflector - light rays
come is reflected
L:in parallel Light
by main mirror Objective mirror = main mirror Aperture Role of secondary mirror and location of observer