Data is complete, please help me to answer questions, thank you! Slope = Planck\

Question

Data is complete, please help me to answer questions, thank you!

Slope = Planck's Constant    8.1 E - 34 J-S

1/ Based on the graph with the best fit straight line, what can you say about the relationship between
the color (or frequency) of light and the energy of its separate bits or photons?

2/ What is Your value of Planck’s constant (h) from the Grapher:( ? ) J-s

3/ What is the accepted value of Planck’s constant from Google: ( ? ) J-s

4/ What is Percent difference of your value from the accepted value:( ? ) %

5/ What is the Photocurrent,mA(Current with zero stopping voltage) for these peak wavelengths?

6/ What is the Stopping voltage , V (Voltage to force Current to zero ) for these peak wavelengths?

Photoelectric Effect Grapher 3 LED Color Wavelength, nm Frequency, Hz ent, MA Stopping voltage, Kinetic energy, J 0.2 0.2 5.08E-14 3.20E-20 5 Orange 590 6 Green 5.66E-14 530 6.40E-20 0.4 0.25 485 6. 19E-14 0.08 1. 28E-19 0.8 7 Blue 1 445 1. 60E-19 8 Ultraviole 6.74E-14 0.06 Enter you experimental data 10 in the eight cells, above. 12

Explanation / Answer

1) E = hf where h is plancks constant and f is frequency.

2)h = 8.1 E-34 Js

3) h = 6.626E-34 Js

4) percentage difference = (8.1-6.626)*100/6.626

= 22.24 %

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