Define EMR, wavelength, frequency, and energy of EMR. Give the equations that relate each. Explain what is meant by the emission spectra of atoms. Give the Rydberg-Balmer equation and for what it is used.

Read the brochure accompanying each spectroscope, then look through your spectroscope at the overhead light and or the light from the window. Note the colors and the range of numbers on the scale above the spectrum. Describe.

Using your spectroscope look at each of the 4 spectrum tubes, Helium, Hydrogen, Mercury, Krypton, and record the wavelength and color of each line you see and use colored pencils to make a sketch of how the lines look to you.

Using a spreadsheet, calculate the frequency and energy for each line for each element.

For hydrogen only, use your spreadsheet with the Rydberg-Balmer equation and your hydrogen wavelengths to calculate the energy level transition for each line. Compare to the Balmer series. Solve the equation for the value of l

Compare your lines for the helium, hydrogen and mercury with those on the spectrum chart. These are expected to be the "true" values. Don't worry about the color in the green-yellow region, the color scale is off, but the wavelength values of the lines are okay.