Copy and paste the below 4 objects (Virgo Cluster, etc.) with their corresponding spectra into your lab report. When the wavelengths of hydrogen lines are measured in a laboratory, using a stationary hydrogen lamp, each line is always found at the same wavelength. We call this wavelength the “rest wavelength” and denote it by rest. For your reference: The rest wavelengths of the hydrogen lines (from right to left) are: