PASCO h/e Apparatus - Experiment 1 Procedure and Analysis

h/e Apparatus and h/e Apparatus Accessory Kit 012-04049J
8
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Procedure
Part A
1. Adjust the h/e Apparatus so that only one of the spectral colors falls upon the opening of the mask
of the photodiode. If you select the green or yellow spectral line, place the corresponding colored
filter over the White Reflective Mask on the h/e Apparatus
2. Place the Variable Transmission Filter in front of the White Reflective Mask (and over the colored
filter, if one is used) so that the light passes through the section marked 100% and reaches the pho-
todiode. Record the DVM voltage reading in the table below.
Press the instrument discharge button, release it, and observe approximately how much time is re-
quired to return to the recorded voltage.
3. Move the Variable Transmission Filter so that the next section is directly in front of the incoming
light. Record the new DVM reading, and approximate time to recharge after the discharge button
has been pressed and released.
Repeat Step 3 until you have tested all five sections of the filter.
Repeat the procedure using a second color from the spectrum.
Color #1
(name)
Color #2
(name)
%Transmission Stopping Potential Approx. Charge
Time
100
80
60
40
20
%Transmission Stopping Potential Approx. Charge
Time
100
80
60
40
20