It will therefore be necessary to adjust source positions, slit widths and lock-in amplifier sensitivity to obtain useful spectra for all four Balmer lines. The H and D lamps use 5000 V power supplies to which the experimenter is dangerously exposed near the metal caps at the ends of the lamps. Please turn off the H and D sources when adjusting their position so as to avoid a potentially fatal shock. Students receiving fatal shocks will not be permitted to work in the laboratory for the remainder of the term. Please take your time and be careful.
Analysis Follow the sequence of steps outlined below.
H air - D air , between the H and D peaks of the four Balmer spectra. Begin working on wavelength calculations from Eq. I right down to the last significant figure. You should agree with every number in those values if you maintain the required number of significant figures. Use a programmable calculator or computer to make your analysis less time-consuming.