10.3;1. The figure shows that the top wave represents the current through the LED. The bottom wave shows the current going across the LED. The shape of the top wave works as a function of the current going through the LED. This means that each time the voltage surpasses the threshold (v turnon)the current passes through the LED and the light turns on. The figure shows how the current going across the LED is a function of the current going through the LED.2.Wavelength (nm)560 nm585 nm635 nm660 nm950 nmFrequency (10^14 Hz)5.353 Hz5.125 Hz4.721 Hz4.542 Hz3.156 HzKnee Voltage (V)12.3 v 12.2 v 12.0 v 11.9 v11.3 v4. The accepted value for the slope of our Knee Voltage vs. Frequency graph (5 x 10-15) is h/e where h is planks constant and e is the elementary charge of an electron. 5. h/e = 5 x 10-15e= 1.602 x 10-19 h/e x e = hm5 x 10-15 x 1.602 x 10-19 = hmhm= 8 x 10-346. (│hm -h│/ h)h = 6.63 x 10-34hm = 8 x 10-34(│8 x 10-34 - 6.63 x 10-34│/ 6.63 x 10-34) = 20% error7. Some sources of error from our experiment could be attributed to faulty equipment we used in the experiment including the wires, LED’s and resistors. Inconsistencies in the equipment could have led to
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