Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 5, Problem 43Q
To determine
The motion of a blue star through space, if it looks blue in the sky.
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What is the significance of the color of a star?
O The color tells how far away the star is
O The color reveals the temperature (and often the size) of the star
O The color is not scientifically important
O The color tells the relative motion of the star to Earth (toward/away)
Find the speed for a star in which this line appears at wavelength 121.8 nmnm.
Express your answer to three significant figures and include the appropriate units.
How would you tell if the direction is away from or toward us?
A bright red star is moving towards Earth. Which of the choices best completes the following statement describing the spectrum of this star? A(n) ___________ spectrum that is _______ relative to an unmoving star.
A.
continuous; blueshifted
B.
continuous; redshifted
C.
emission; redshifted
D.
absorption; blueshifted
E.
absorption; redshifted
Chapter 5 Solutions
Universe
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Ch. 5 - Prob. 11CCCh. 5 - Prob. 12CCCh. 5 - Prob. 13CCCh. 5 - Prob. 14CCCh. 5 - Prob. 1CLCCh. 5 - Prob. 2CLCCh. 5 - Prob. 3CLCCh. 5 - Prob. 1QCh. 5 - Prob. 2QCh. 5 - Prob. 3QCh. 5 - Prob. 4QCh. 5 - Prob. 5QCh. 5 - Prob. 6QCh. 5 - Prob. 7QCh. 5 - Prob. 8QCh. 5 - Prob. 9QCh. 5 - Prob. 10QCh. 5 - Prob. 11QCh. 5 - Prob. 12QCh. 5 - Prob. 13QCh. 5 - Prob. 14QCh. 5 - Prob. 15QCh. 5 - Prob. 16QCh. 5 - Prob. 17QCh. 5 - Prob. 18QCh. 5 - Prob. 19QCh. 5 - Prob. 20QCh. 5 - Prob. 21QCh. 5 - Prob. 22QCh. 5 - Prob. 23QCh. 5 - Prob. 24QCh. 5 - Prob. 25QCh. 5 - Prob. 26QCh. 5 - Prob. 27QCh. 5 - Prob. 28QCh. 5 - Prob. 29QCh. 5 - Prob. 30QCh. 5 - Prob. 31QCh. 5 - Prob. 32QCh. 5 - Prob. 33QCh. 5 - Prob. 34QCh. 5 - Prob. 35QCh. 5 - Prob. 36QCh. 5 - Prob. 37QCh. 5 - Prob. 38QCh. 5 - Prob. 39QCh. 5 - Prob. 40QCh. 5 - Prob. 41QCh. 5 - Prob. 42QCh. 5 - Prob. 43QCh. 5 - Prob. 44QCh. 5 - Prob. 45QCh. 5 - Prob. 46QCh. 5 - Prob. 47QCh. 5 - Prob. 48QCh. 5 - Prob. 49QCh. 5 - Prob. 50QCh. 5 - Prob. 51Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Which method would you use to obtain the distance to each of the following? A. An asteroid crossing Earth’s orbit B. A star astronomers believe to be no more than 50 light-years from the Sun C. A tight group of stars in the Milky Way Galaxy that includes a significant number of variable stars D. A star that is not variable but for which you can obtain a clearly defined spectrumarrow_forwardExplain how we can deduce the temperature of a star by determining its color.arrow_forwardWhat is the main reason that the spectra of all stars are not identical? Explain.arrow_forward
- Star X has lines of ionized helium in its spectrum, and star Y has bands of titanium oxide. Which is hotter? Why? The spectrum of star Z shows lines of ionized helium and also molecular bands of titanium oxide. What is strange about this spectrum? Can you suggest an explanation?arrow_forwardWhat is the temperature of a star whose maximum light is emitted at a wavelength of 290 nm?arrow_forwardOur Sun is considered an "average" star. What is the average star really like? Explain. Could you go out at night and point out an average star? Why or why not?arrow_forward
- Find the speed for a star in which this line appears at wavelength 122.5 nmnm. Express your answer to three significant figures and include the appropriate units.arrow_forwardThe three most prominent spectral lines of hydrogen are H-α at 656 nm, H-β at 486 nm, and H-γ 434 nm. If we observe an object with H-α at a wavelength of 700 nm, what wavelength will we observe H-β and H-γ? Is the object moving toward or away from us, and how do you know? Suppose we observe another object with H-α at 585 nm. Is this object moving toward or away from us? Is it moving slower or faster than the first object?arrow_forwardThe follow are the major categories of light (depending on your profession many of these can be divided up even more). Which of these light types has the largest wavelength? Question 6 options: Radio Microwave Infrared Visible Ultraviolet X-Ray γ{"version":"1.1","math":"<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>γ</mi></math>"}-Rayarrow_forward
- Imagine our solar system is moving in the Milky Way toward a group of three stars. Star A is a blue star that is slightly closer to us than the other two. Star B is a red star that is farthest away from us. Star C is a yellow star that is halfway between Stars A and B. Which of these three stars, if any, will give off light that appears to be redshifted? А. А В. В O C. C D. All three stars will appear to be redshifted. E. None of these stars will appear to be redshifted.arrow_forwardWe observe a star's spectral line at 510 nm which is normally at 500 nm. How fast is the star moving towards or away from us?arrow_forward1) The Earth's orbital speed is approximately 30 km/s. A star emits a spectral line with 2=517.3 nm. Over what range does the wavelength oscillate as the Earth orbits the Sun (if the star is located at the ecliptic)?arrow_forward
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