4. 1. Add a column and call it: frequency (Hz). 2. Use the "change column formula" function to calculate the frequency of the light using the relationship: f = c/A. Watch your units here. We need them in Hz. 3. Add another column called KEmaz 4. We are going to measure KE in J. To do this use the "change column formula" again and use the relationship: KEmaz = eV where e = 1.6x10-1⁹C. Now we are ready to find the Work function and Planck's Constant. • What quantities should you graph on the vertical and horizontal axes of your graph? How will the graph determine Planck's constant and the work function?
4. 1. Add a column and call it: frequency (Hz). 2. Use the "change column formula" function to calculate the frequency of the light using the relationship: f = c/A. Watch your units here. We need them in Hz. 3. Add another column called KEmaz 4. We are going to measure KE in J. To do this use the "change column formula" again and use the relationship: KEmaz = eV where e = 1.6x10-1⁹C. Now we are ready to find the Work function and Planck's Constant. • What quantities should you graph on the vertical and horizontal axes of your graph? How will the graph determine Planck's constant and the work function?
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Transcribed Image Text:4.
1. Add a column and call it: frequency (Hz).
2. Use the "change column formula" function to calculate the frequency of the light using the relationship: f = c/A. Watch
your units here. We need them in Hz.
3. Add another column called KEmaz.
4. We are going to measure KE in J. To do this use the "change column formula" again and use the relationship: KEmaz = eV
where e = 1.6x10-1⁹ C.
Now we are ready to find the Work function and Planck's Constant.
What quantities should you graph on the vertical and horizontal axes of your graph?
How will the graph determine Planck's constant and the work function?
.
.
Transcribed Image Text:3. Use this table and graph to collect and analyze data.
Hint: KE=eV in J
1
2
3
4
5
When e = electron charge = 1.6x10^-19C
V- is the Stoping Potencial,
f=c/wave length,
c- is the speed of light on the empty space, c=3*10^8m/s
*
KE max (J)
***
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wavelength
nm
4.05
4.73
5.32
5.89
6.35
2.5x10-19
2x10-19
1.5x10-19
1x10-19
variable
50M
stopping potential ...
V
1.8
1.2
0.90
0.98
0.48
✔Display Curve Fit Uncertainties
KE max Curve:
y = Ax+B
A: 6.92 x 10-27 +1.25 x 10-27
B: -2.33 x 10-197.39 × 10-20 J
RMSE 2.66 x 10-20 J
T: 0.955
variable
Frequency
55M
HZ
7.41e+7
6.34e+7
5.64e+7
5.09e+7
4.72e+7
X
KE max vs Frequency V
60M
Frequency (HZ)
KE max
2.88e-19
1.92e-19
1.44e-19
1.57e-19
7.68e-20
65M
y
***
70M
●
*
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