One star appears blue-white while another appears yellow-orange. ...

[jayhills49]

One star appears blue-white while another appears yellow-orange. If this is caused by temperature difference, then
 
  A)
 
  the stars are the same brightness.
  B)
 
  the yellow-orange star is hotter.
  C)
 
  the blue-white star is brighter.
  D)
 
  the blue-white star is hotter.
  E)
 
  the yellow-orange star is brighter.

Question 2

The number of different kinds of leptons, including antiparticles as different, is
 
  A)
 
  4.
  B)
 
  6.
  C)
 
  8.
  D)
 
  2.
  E)
 
  12.

[lou]

Answer to Question 1

D

Answer to Question 2

E

[jayhills49]

TYSM

[momolu]

Gracias!