A blackbody is an ideal system that A) absorbs 100 of the ...

[CharlieWard]

A blackbody is an ideal system that
 
  A) absorbs 100 of the light incident upon it, but cannot emit light of its own (i.e., a black body).
  B) emits 100 of the light it generates, but cannot absorb radiation of its own.
  C) either absorbs 100 of the light incident upon it, or emits 100 of the radiation it generates.
  D) absorbs 50 of the light incident upon it, and emits 50 of the radiation it generates.

Question 2

Consider a Carnot refrigerator which is operated between -3C and 23.C. What is its COP?
 
  A) 10
  B) 9.0
  C) 11.
  D) 10.
  E) 3.1

[FergA]

Answer to Question 1

B

Answer to Question 2

B