Photoelectric Effect Apparatus
Model No. AP-8209
15
®
6.
Turn off the POWER on the apparatus.Turn off the MERCURY LAMP power switch and
the POWER switch on the power supply. Return the apertures, filters, and caps to the
OPTICAL FILTERS box.
Analysis
1.
Plot the graphs of Current (y-axis) versus Voltage (x-axis) for the one spectral line, 436 nm,
at the three different intensities.
Questions
1.
How do the curves of current versus voltage for the one spectral line at three different
intensities compare? In other words, how are the curves similar to each other?
2.
How do the curves of current versus voltage for the one spectral line at three different
intensities contrast? In other words, how do the curves differ from each other.
Table 4: Current and Voltage of Spectral Lines
λ
= 435.8 nm
2 mm dia.
V (V)
I (x 10
-11
A)
λ
= 435.8 nm
4 mm dia.
V (V)
I (x 10
-11
A)
λ
= 435.8 nm
8 mm dia.
V (V)
I (x 10
-11
A)
