Which reflector telescope would be the easiest to construct, and ...

[sheilaspns]

Which reflector telescope would be the easiest to construct, and why?
 
  What will be an ideal response?

Question 2

The most famous case of a more massive hot star orbiting with a more evolved but presently less massive red giant is the eclipsing binary:
 
  A) Aldeberan.
  B) Antares.
  C) Algol.
  D) Alberio.
  E) Altair.

[Loise Hard]

Answer to Question 1

The prime focus reflector needs only a single optical surface, on the front of the main mirror.

Answer to Question 2

C

[sheilaspns]

Thanks for the timely response, appreciate it

[Jossy]

Gracias!