Author Question: What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV ... (Read 52 times)

tatyanajohnson · **on:** Jul 28, 2018

What is the maximum velocity of a photoelectron emitted from a surface with work function 5.22 eV when illuminated by 200-nm ultraviolet light? (melectron = 9.11 10-31 kg, h = 6.63 10-34 Js, 1 eV = 1.60 10-19 J, and 1 nm = 10-9 m)
a. 800,000 m/s
c. 653,000 m/s
b. 212,000 m/s
d. 591,000 m/s

Question 2

How much energy (in eV) does a photon of 500-nm light have? (h = 6.63 10-34 Js, c = 3.00 108 m/s, 1 eV = 1.60 10-19 J, and 1 nm = 10-9 m)
a. 1.78 eV
c. 1.24 eV
b. 2.48 eV
d. 3.11 eV