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Unformatted text preview: constant. The data of V is graphed against 1/ . The slope of the line is determined and then set ƛ equal to hc/e and Planck’s constant is later solved for. Data (Table 1) V-1 Curves: Data (Table 2): Vd-f Graph: Conclusion and Discussion: As we read in the experiment manual, “the diode’s characteristic curve is displayed on an oscilloscope, a ‘knee’ in the curve is seen clearly.” Graphs for each diode were made, and the “knee” is visible at the beginning of each graph. The lab verified the existence of Planck’s Constant and confirmed the relationship between voltage, frequency, the speed of light, and Planck’s Constant. The calculations for the 920 nm LED were much skewed so we decided to exclude that data from the rest. This was due to having a bad LED which changed our calculated values....
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- Spring '12
- Planck, Light-emitting diode, Stevens Honor System, 920 nm