The ratio of the light-gathering power of Reflecting Telescope 1 with a primary mirror of diameter ...

The ratio of the light-gathering power of Reflecting Telescope 1 with a primary mirror of diameter 1.6 m to Reflecting Telescope 2 with a primary mirror of diameter 0.008 m is ____.
 
  A) 40 to 1
  B) 400 to 1
  C) 4000 to 1
  D) 40,000 to 1

Question 2

Radio telescopes have poor resolving power because:
 
  A) they have the smallest diameters.
  B) they cannot measure wavelengths larger than 102 m.
  C) radio waves have long wavelengths.
  D) radio waves have small diffraction fringes.

Question 3

In the context of the electromagnetic spectrum, which of the following forms of electromagnetic radiation has a shorter wavelength than the shortest wavelength of visible light?
 
  A) Red light
  B) Microwaves
  C) Radio waves
  D) Ultraviolet light