®
Model No. AP-8209
Photoelectric Effect Apparatus
24
Table 6: Stopping Potential of Spectral Lines, 4 mm diameter Aperture
The next two tables show typical data for Stopping Potential of Spectral Lines for the 2 mm and 8
mm diameter apertures.
Table 7: Stopping Potential of Spectral Lines, 2 mm diameter Aperture
Table 8: Stopping Potential of Spectral Lines, 8 mm diameter Aperture
Experiment 2: Measuring Current-Voltage Characteristics of Spectral Lines -
Constant Frequency, Different Intensity
The illustration shows typical data for
current versus voltage for a single spectral
line (435.8 nm) with three different
apertures.
The next table shows typical data for current
versus voltage for a constant frequency and
three different apertures.
Item
1
2
3
4
5
Wavelength,
λ
(nm)
365.0
404.7
435.8
546.1
577.0
Frequency,
ν=
c
/λ
, (x 10
14
Hz)
8.214
7.408
6.879
5.490
5.196
Stopping Potential,
V
(V)
1.622
1.274
1.068
0.518
0.384
Item
1
2
3
4
5
Wavelength,
λ
(nm)
365.0
404.7
435.8
546.1
577.0
Frequency,
ν
, (x 10
14
Hz)
8.214
7.408
6.879
5.490
5.196
Stopping Potential,
V
(V)
1.596
1.253
1.053
0.514
0.382
Item
1
2
3
4
5
Wavelength,
λ
(nm)
365.0
404.7
435.8
546.1
577.0
Frequency,
ν
, (x 10
14
Hz)
8.214
7.408
6.879
5.490
5.196
Stopping Potential,
V
(V)
1.652
1.299
1.081
0.526
0.390
Current-Voltage, Constant Frequency