1. Atomic Spectra

3. Continuous Spectra

4. The (Visible) Hydrogen Spectrum

5. Other Spectra

6. Notes on the Procedure • Do steps 3-5 in part A • Measure at least 3 of the 4 hydrogen lines (the deep purple one may be really hard to see) • In report, give % errors for the measured hydrogen lines. • Measure at least 4 of the helium lines • Observe the other elements (don’t have to measure the wavelengths) • Ignore all of part B and data sheet B • For part C • Your graph should look similar to figure 3, except to scale • Use your own graph paper • Be sure to include the 1216 Angstrom line • You can set the y=0 line as the n=1 (ground state) energy level

7. Qualitative Observations of Other Elements • How does the number of lines change with the atomic number (periodic table might help)? • How does the spacing of the lines change with atomic number? • Any noticeable relation between the brightness and colors of individual emission lines and the blended light emitted by the element? • Try to explain why these trends happen (you don’t have to be right, just try and give me some logical explanation). • Observe hydrogen, deuterium (hydrogen with an extra neutron), and water. Discuss similarities and differences in their spectra, and why these might occur. • Feel free to discuss and other interesting features you see.