PHYS-1207EL Study Guide - Final Guide: Diffraction Grating, Sodium-Vapor Lamp, Balmer Series
31 Jan 2021
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Purpose: to measure the wavelengths of the first four lines of the balmer series of the hydrogen spectrum, calculate the value of the rydberg constant and the energy level for each of the four lines. If the equipment is being used, you can start with part b right now and do part a later. Using the average of both spectral angles, determine the distance (d) between the lines of your grating. Use the first order of diffraction only. pg. Possible sources of errors for this experiment are: The energy level for violet is 3. 02 ev, for blue is 5. 38 ev and for red is 8. 01 ev. This is a percent error from the accepted value of 95 % for violet, 82 % for blue and 86 % for red. Rydberg constant is -4. 29x107 which is a percent error of 100 % from the accepted value. pg.
