Question

do you notice any difference in the locations of the absorption lines in the reference spectrum and the spectrum for star c-197? describe. 3. measure: drag the probes to equivalent lines in each spectrum. then, zoom in on the graph by clicking +. adjust the probes so they are exactly on each absorption line. a. what is the wavelength of the line on the reference spectrum? b. what is the wavelength of the line on star c-197s spectrum? c. has the spectral line of star c-197 been shifted to the right (redshift) or to the left (blueshift)?

Explanation:

For the first question (about difference in absorption line locations):

To answer this, we analyze the spectral lines. In typical stellar spectroscopy, if a star is moving away (redshift) or towards (blueshift), absorption lines shift. For star C - 197, we compare its spectrum to the reference. Usually, in such problems (like using a simulator), the absorption lines of star C - 197 are shifted. For example, if the reference has lines at a certain wavelength, C - 197's lines might be shifted right (redshift) or left (blueshift). A common scenario (e.g., in Hubble's law - related simulations) is that star C - 197's absorption lines are shifted to the right (redshift), meaning the wavelengths are longer than the reference. So the difference is that the absorption lines of star C - 197 are at different (usually longer, redshifted) wavelengths compared to the reference.

Step1: Identify the reference spectrum line

Look at the reference spectrum graph, find the absorption line, and read its wavelength. In many stellar spectrum simulations, a common reference absorption line (e.g., for hydrogen) has a wavelength of $\boldsymbol{656.3\ nm}$ (this is a typical value for H - alpha line in rest frame).

Step1: Measure star C - 197's line

Using the probes and zooming, find the absorption line in star C - 197's spectrum and read its wavelength. In a redshift - related problem, it will be longer than the reference. For example, if reference is 656.3 nm, a possible value (depending on simulation) is $\boldsymbol{658.0\ nm}$.

Answer:

The absorption lines of star C - 197 are shifted (e.g., to the right/redshifted, meaning their wavelengths are longer than in the reference spectrum).

For sub - question A:

(Note: Since this is a measurement question, the answer depends on the actual spectrum. But in typical simulations, the reference spectrum's absorption line wavelength for such a problem (e.g., for a hydrogen line like H - alpha) might be around 656.3 nm (for example). But assuming a common simulation setup)