Which telescope has the largest light-gathering power among the ...

[Garrulous]

Which telescope has the largest light-gathering power among the following telescopes?
 
  A) A telescope of diameter 5 cm and focal length 50 cm
  B) A telescope of diameter 6 cm and focal length 100 cm
  C) A telescope of diameter 2 cm and focal length 100 cm
  D) A telescope of diameter 3 cm and focal length 75 cm

Question 2

A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely a:
 
  A) small diameter reflecting telescope.
  B) small diameter refracting telescope.
  C) large diameter refracting telescope.
  D) large diameter reflecting telescope.

[todom5090]

Answer to Question 1

B

Answer to Question 2

B

[Garrulous]

Thanks for the timely response, appreciate it

[zacnyjessica]

Excellent