Please answer the following questions.

Lab 6: The Spectral curve if a Star In order to better study stars to make diagrams with them, we must know a bit about the colors of the stars as the color of a star exactly correlates to the temperature of the star. First, we must learn a little bit about light and the spectral curve of a star. White light is made up of all colors of light. We can see the individual colors when white light is passed through a prism or look at a rainbow. Light can come in an array of types or forms, which we call a \"spectrum.\" A \"spectral curve\" (like the one shown below) is a graph which displays the amount of energy given off by an object each second versus the different wavelengths (or colors) of light. For a specific color of light on the horizontal axis, the height of the curve will indicate how much energy is being given off at the particular wavelength. Figure 1 shows the spectral curve for an object emitting more red and orange light than indigo and violet. Notice that the red end of the curve is higher than the violet end so the object will appear slightly reddish in color. V | B G Y 0 R Violet Indigo Blue Green Yellow Orange Red Energy Output per second Figure 1 1. Which color of light has the greatest energy output in Figure 1? 2. Imagine that the blue light and orange light from the source were blocked. What color(s) would now be present in the spectrum of light observed? 3. Which of the following is the most accurate spectral curve for the spectrum described in question 2? Qo o et o ~ Energy Output per second Energy Output per second Energy Output per second VI IB R CESYMONR: Vel SRNGH Y NONR Vi I By G- Y OBR Figure 2 4. What main colors are present in figure 2b above? 5. What colors are present in figure 2 above? Would this object appear reddish or bluish? Different colors of light are manifestations of the same phenomenon but have different wavelengths. For example, red light has a wavelength between 650nm and 750nm, while violet light has a shorter wavelength between 350nm and 450nm. Stars also give off light at wavelengths outside the visible part of the spectrum as seen in figures 3a, 3b, and 3c. The two most important features of a star's spectral curve (also known as a blackbody curve) are: Its maximum height or \"peak\" where the energy output is greatest e The corresponding wavelength/color at which this peak occurs. The color of this peak wavelength indicates the star's temperature (peak occurs at longer wavelength (redder color) star cooler; peak at shorter wavelength (bluer color) star hotter For example, if Star E and Star F are the same size and temperature, they will have identical blackbody curves. However, while Star F is the same size as Star E, it really is cooler, thus Star F's energy output is less at all wavelengths and the peak occurs at a longer wavelength (toward the red end of the spectrum). Visible "-ilarlg: Energy Output {per second) VIiBuYok Wavelength Figure 2a Use Figure 2a to answer Questions 6 -8. Assume Stars E and F are the same size (as described above). 6. Using the graphs, which star in Fig 2a (E or F) gives off more light that is red? Explain your reasoning. 7. Which star in Fig 2a (E or F) gives off more light that is blue? Explain your reasoning. 8. Which star in Fig 2a (E or F) leoks redder? Explain your reasoning. 9. 10. 1. 12. Two students are discussing their answers to question 8: Student 1: Star E looks redder because it is giving off more red light than Star F. Student 2: disagree, you 've been ignoring how much blue light star E gives off star E gives off more blue light than red light so it looks bluish. Star F gives off more red than blue so it looks reddish. That's why star F looks redder than Star E. Do you agree or disagree with either or both of the students? What is wreng about any part of either/both statements? Using the blackbody curves shown in Figure 2b (shown below) for stars E and C, circle the characteristics shown below that best correspond with Stars E and C Peaks at the linger wavelength: Star E Star C They peak at the same wavelength Lower surface temperature: Star E Star C They have the same surface temp. Looks red: Star E Star C Both look red Neither looks red Looks blue: Star E Star C Both look blue Neither looks blue Greater energy output: Star E Star C They have the same energy output How must Star C be different from Star E to account for their differences in energy output/brightness? Two students are discussing their answers to question 11: Student 1: The peaks are at the same place so they must be the same temperature. If Star C were as big as Star E, it would have the same output. Since the output is lower, Star C must be smaller. Student 2: No. If the output is lower, a star must be cooler. And if the temperature of the two stars are the same, they must be the same size so different temperatures mean different sizes. Do you agree or disagree with either or both of the students? What is wrong about any part of either/both statements? Visible Visible Visible Star E Range Range Range 8000 Star D Star E Star E 8000 8000 Same SIZE Energy Output (per second) stars! Energy Output (per second) Energy Output (per second) Star F i Star C 4000.K VIBGYOR TITIT Wavelength VIBGYOR Wavelength Wavelength I BGYOR Figure za Figure 2b Figure 2c Consider the blackbody curves shown in Figure 2c when answering questions 13-15 13. For each star Fig 2c (E and D), describe its color as either reddish or bluish. 14. Which star in Fig 2c (E and D) has the greatest surface temperature? Explain your reasoning 15. Which star in Fig 2c (E or D) is larger? Explain your reasoning. (hint: consider that you've just looked at examples of two stars that are the same size but different temperature (E & F) and of two stars that are the same temperature but different sizes (E & C))