Multiple Choice
A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV.What is the threshold frequency for photoelectron production? (h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)
A) 6.8 × 1014 Hz
B) 2.7 × 1014 Hz
C) 7.6 × 1014 Hz
D) 8.5 × 1014 Hz
E) 9.4 × 1014 Hz
Correct Answer:
Verified
Correct Answer:
Verified
Q9: A beam of red light and a
Q36: A stopping potential of 0.50 V is
Q37: How fast must a nonrelativistic electron move
Q38: Electrons emerge from an electron gun with
Q39: A hydrogen atom initially in the n
Q40: A metal having a work function of
Q41: A single slit is illuminated at normal
Q43: Gamma rays are photons with very high
Q44: A nonrelativistic electron has a kinetic energy
Q45: Upon being struck by 240-nm photons,a metal