21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 5, Problem 26QP
To determine
The facts about the colors that tells about the relative temperatures of the two stars.
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Please answer the question about light and color:
Which line is easier to see under red light, the red or the black line? Why?
What makes red ink appear red? When red ink is illumined by blue light, is most of the light absorbed or reflected?
When illumined with red light, why is red ink on white paper more difficult to see than black ink?
If you see a red-hot star, you can be certain that its peak intensity is in the infrared region. Why is this?
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
21st Century Astronomy
Ch. 5.1 - Prob. 5.1ACYUCh. 5.1 - Prob. 5.1BCYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5 - Prob. 1QPCh. 5 - Prob. 2QPCh. 5 - Prob. 3QPCh. 5 - Prob. 4QP
Ch. 5 - Prob. 5QPCh. 5 - Prob. 6QPCh. 5 - Prob. 7QPCh. 5 - Prob. 8QPCh. 5 - Prob. 9QPCh. 5 - Prob. 10QPCh. 5 - Prob. 11QPCh. 5 - Prob. 12QPCh. 5 - Prob. 13QPCh. 5 - Prob. 14QPCh. 5 - Prob. 15QPCh. 5 - Prob. 16QPCh. 5 - Prob. 17QPCh. 5 - Prob. 18QPCh. 5 - Prob. 19QPCh. 5 - Prob. 20QPCh. 5 - Prob. 21QPCh. 5 - Prob. 22QPCh. 5 - Prob. 23QPCh. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Prob. 26QPCh. 5 - Prob. 27QPCh. 5 - Prob. 28QPCh. 5 - Prob. 29QPCh. 5 - Prob. 30QPCh. 5 - Prob. 31QPCh. 5 - Prob. 32QPCh. 5 - Prob. 33QPCh. 5 - Prob. 34QPCh. 5 - Prob. 35QPCh. 5 - Prob. 36QPCh. 5 - Prob. 37QPCh. 5 - Prob. 38QPCh. 5 - Prob. 39QPCh. 5 - Prob. 40QPCh. 5 - Prob. 41QPCh. 5 - Prob. 42QPCh. 5 - Prob. 43QPCh. 5 - Prob. 44QPCh. 5 - Prob. 45QP
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- 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_forwardGo outside on a clear night, wait 15 minutes for your eyes to adjust to the dark, and look carefully at the brightest stars. Some should look slightly red and others slightly blue. The primary factor that determines the color of a star is its temperature. Which is hotter: a blue star or a red one? Explainarrow_forwardWhat is the temperature of a star whose maximum light is emitted at a wavelength of 290 nm?arrow_forward
- If a luminous object were moved to one-half the original distance, it would appear a. one-half as bright. b. just as bright. c. twice as bright. d. four times brighter. e. eight times brighter.arrow_forwardIf a star gives off light at a peak wavelength of 6.80x10-7 m. What would be the temperature of this star in Kelvin?arrow_forwardWhich of the following are characteristic of ultraviolet radiation from a star? a. It will not penetrate Earth’s atmosphere and reach the ground. b. It has a wavelength that is longer than the visible light emitted by the star. c. It has a wavelength that is shorter than the X rays emitted by the star. d. a and b e. b and carrow_forward
- Excited (ionized) clouds of hydrogen gas emit the visible Balmer wavelengths, which blend to produce the typical ______________________ color. a. green b. blue c. yellow d. pink e. violetarrow_forwardYou move your outdoor plant (where it is growing with full sun conditions - receiving all wavelengths of light in the visible spectrum) inside for winter. You now grow it under a green grow light bulb (energy emitted is only in the green wavelength, but is the same intensity as full sun conditions). You predict its rate of photosynthesis (only considering the change in light wavelength) will: Increase Decrease Remain the samearrow_forward
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