The amount of diffraction, and thus the resolution of the scope, ...

[dmcintosh]

The amount of diffraction, and thus the resolution of the scope, depends upon:
 
  A) the wavelength used and the size of the main telescope objective lens or mirror.
  B) the design of the telescope.
  C) whether the telescope is a reflector or refractor.
  D) the brightness of the object.
  E) the size and sensitivity of the CCD chip used for imaging.

Question 2

Which two energy sources can help a star maintain its internal thermal pressure?
 
  A) nuclear fusion and gravitational contraction
  B) nuclear fission and gravitational contraction
  C) nuclear fusion and nuclear fission
  D) chemical reactions and gravitational contraction
  E) nuclear fusion and chemical reactions

[mjenn52]

Answer to Question 1

A

Answer to Question 2

A

[dmcintosh]

TYSM

[emsimon14]

Excellent