The Balmer series is formed by electron transitions in hydrogen ...

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The Balmer series is formed by electron transitions in hydrogen that
 
  A) are between the n = 1 and n = 3 shells.
  B) end on the n = 2 shell.
  C) end on the n = 1 shell.
  D) begin on the n = 1 shell.
  E) begin on the n = 2 shell.

Question 2

The radius of a star is 6.95  108 m, and its rate of radiation has been measured to be 5.32  1026 W. Assuming that it is a perfect emitter, what is the temperature of the surface of this star? ( = 5.67  10-8 W/m2  K4 )
 
  A) 6.27  103 K B) 8.25  103 K C) 5.78  107 K D) 3.93  107 K E) 8.87  103 K

[peter]

Answer to Question 1

B

Answer to Question 2

A