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Photoelectric Effect
Wavelength
nm
f
=1.11 THz E =4.60 eV
Intensity: 60%
-
+
0.00 V
0.00
8.00
Work Function
eV
Cs (2.12 eV)
Na (2.27 eV)
Ba (2.51 eV)
Fe (4.36 eV)
Ag (4.28 eV)
Mg (3.46 eV)
Co (4.18 eV)
Cd (3.92 eV)
Al (3.74 eV)
Ni (4.84 eV)
Cu (4.47 eV)
W (4.5 eV)
Cr (4.51 eV)
Zn (3.74 eV)
Au (4.58 eV)
Pb (4.02 eV)
Energy of Electron vs Frequency
0.5
1
1.5
2
2.5
3
Frequency ( x10
15
Hz)
Energy (eV)
1
2
3
4
5
6
7
8
9
10
Slope = h
E
k(max)
= 1.88 eV
f
= 1.11 THz
To emit electron:
f
min
= 0.66 THz
λ
max
= 457.94 nm
