Experiment 16: Determining Plank's Constant

Objective:
Approximate plank's constant with an LED Light circuit.

Equipment:
-LED Lights (green. red, yellow, blue, white)
-2 M Ruler
-Meter stick
-Diffraction grating
-Clamps and stands
-Voltage generator
-Voltmeter
-Resistor

Procedure:
We set up the system as shown in the picture below. We determined the horizontal distance of the LED light's spectrum (similar to previous lab).

The following are the LED light spectra observed through the diffraction grating:

Data/Calculations:

We recorded our observations and moved them to an excel sheet the formula used is shown below:

Conclusion:
Though we got a significantly large error bound, it was to be expected due to the many uncertainties involved in this lab.