# Plank - Date: 12 Sep 2006 Physics 205L DETERMINATION OF...

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Date: 12 Sep 2006 Physics 205L DETERMINATION OF PLANCK’S CONSTANT Name: Mohamad Karim Kechli Section number: 1 Partner’s Name: Khalil Anouti Instructor: Rana Ashkar Grade: A- Data: Determination of the stopping potential for each color: First Order Color Wavelenght (nm) Frequency (Hz) Stopping Potential (V) Yellow 578 5.19x10 14 0.70 Green 546.074 5.49x10 14 0.78 Blue 435.825 6.88x10 14 1.28 Violet 404.656 7.41x10 14 1.39 Ultraviolet 365.483 8.21x10 14 1.62 Second Order Color Wavelenght (nm) Frequency (Hz) Stopping Potential (V) Yellow 578 5.19x10 14 0.58 Green 546.074 5.49x10 14 0.64 Blue 435.835 6.88x10 14 1.08 Violet 404.656 7.41x10 14 1.18 Ultraviolet 365.483 8.21x10 14 1.3 1

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B- Analysis : Plot the two curves of the stopping potential as a function of frequency, on the same graph paper. Determine the slope and the y-intercept of each curve. Use these results to determine Planck’s constant and the work function of the cathode material. Comment. First Order:
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## This note was uploaded on 01/06/2012 for the course PHYS 205L taught by Professor Antar,ghassan during the Spring '11 term at American University of Beirut.

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Plank - Date: 12 Sep 2006 Physics 205L DETERMINATION OF...

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