From the facts shown below, select those that correspond to reasons why the large modern telescopes are reflector telescopes [mark all correct answers] a. They can be made larger than refractor telescopes due to the fact that the objective mirror is all along the back side of the telescope. b. Reflector telescopes are cheaper to make than refractors of the same size. c. The glass surface inside the tube is sealed from the atmosphere so it rarely needs cleaning. d. Reflector telescopes do not suffer from chromatic aberration because all wavelengths will reflect off the mirror in the same way. e. Refractor telescopes do not suffer from chromatic aberration because all wavelengths will reflect off the mirror in the same way. f. Reflector telescopes are rugged. After the initial alignment, their optical system is more resistant to misalignment than the refractor telescopes