A beam of light with a frequency range from 3.01 1014 Hz to 6.10 ...

[Lobcity]

A beam of light with a frequency range from 3.01  1014 Hz to 6.10  1014 Hz is incident on a metal surface.
 
  If the work function of the metal surface is 2.20 eV, what is the maximum kinetic energy of photoelectrons ejected from this surface? (h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 0.42 eV B) 0.21 eV C) 0.33 eV D) 0.48 eV E) 0.16 eV

Question 2

Which of the following are characteristics of laser light? (There may be more than one correct choice.)
 
  A) It is coherent.
  B) It contains a full spectrum of wavelengths.
  C) It is produced by an inverted population of atoms.

[Jordin Calloway]

Answer to Question 1

C

Answer to Question 2

A, C

[Lobcity]

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[Jordin Calloway]

You're welcome