Part 3: Doppler Shift The Doppler shift is discussed in Lecture 6.6 . Please refer to that lecture when doing this portion of the lab. 4060 5800 6000 7060 Sodium spectral lines for stationary object 5830 and 3900 Jingstroms Figure &. Above is a Nyure showing sodamn emission Joes (Courtesy of Stanford Sofer CenterNASA). The reference lines for sodlow are SEND and $900 Asparrows (bonom figure). But we measure the wavelength of the two lines in our zar at 3583 and 6030 Angstroms flop figure). Lab 6: Question 10 Figure 6 shows two emission line spectra. The bottom spectrum is for a stationary object ( reference values), with the two lines at 5900 and 5880 Angstroms. The top spectrum shows lines emitted by a star that is moving, so the observed lines have been Doppler shifted to 6000 and 5980 Angstroms. Which way is the star moving relative to the Earth? * Towards Earth . Away from Earth