Question

6. Photoelectric effect. You perform a photoelectric experiment on an unknown material and get the following data: Stopping potential (V) 0.4 Frequency (THz) 560 700 780 830 1010 1210 1.3 1.7 2.4 From this data, and using Excel or an equivalent data tool, find a. the work function (in eV). b. the cutoff (threshold) wavelength for this material, c. the slope, d, an estimate of h e. What is your percent error in your h calculation? Include the Excel graph with your work.

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Answer #1

I have used origin to plot the graph

and threshold frequency = 447.72 THz

y intercept = work function = 1.8267 eV

slope = 0.00408

h = 6.53 x 10-34 Js

OriginPro 8.6 32-bit -ClUsersl Gupta)Documents OriginLab185User Files UNTITLED - /Folderl/ - [Graph8] File Edit View Graph Data Analysis Gadgets Tools Format Window Help よ电唱 Ph Default: Arial 10 0.5 Project Explorer 〔1〕 Equation Weight Resi dual Sum of Squares UNTITLED No Weighting 00503 stopping potential -Linear Fit of Sheet 1 stopping potential 3.0 099438 98599 earsonsr Ad). R-Square Value Standard Eror stopping potenti Intercept stopping potenti Slope 1.8267 0.00408 0.18978 2 17091E-4 2.5 2.0 Bo Work Nor 9KB 1/2 Work Nor 150KB 1/2 Bo Work Nor 80KB 1/2 a 1.0 To Work Nor 9KB 0.5 Ta Work Hidd 9KB 1/2 Ta Work. Hidd... 9KB 1/2 Work... Hidd. 9KB 1/2 Gr Graph Nor 30KB 1/2 Gr Graph Nor 9KB 112 Gr Graph Nor 9KB 1/2 目Gr Graph Nor… 9KB 1/2 0.0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 frequency (THz) Gr Graph Nor 9KB 1/2 ︾ Book3]FitlinearCurve3l(A1 Independent Variable A2 Linear Fit of Sheet1 stopping potential AU: ON Dark Colors & Light Grids 1:Book3Sheet1 Coll stopping potential)1:6 1:[Graph811 Ra Radian O Type here to search 1/28/2019

please rate it up thanks :)

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