UNDERSTANDING THE UNIVERSE(LL)-W/CODE
3rd Edition
ISBN: 9780393869903
Author: PALEN
Publisher: NORTON
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Chapter 11, Problem 35QAP
To determine
The way in which the fate of Hubble telescope is tied to solar activity.
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Even though neutral hydrogen is the most abundant element in interstellar matter, it was detected first with a telescope, not a visible light telescope. Explain why.
Given that the solar spectrum corresponds to a temperature of 5800 K and peaks at a wavelength of 500 nm, use Wien's
law to determine the wavelength corresponding to the peak of the black-body curve in the solar photosphere of the Sun,
where the temperature is 104 K
(a) Rank the following components of the interstellar medium in order of the wavelengths at which they are observed, longest wavelength first: clouds of neutral hydrogen, coronal gas, interstellar dust, nebulae. Longest to Shortest?
(b) Rank the same material in order of decreasing temperature from hottest to coolest. Hottest to Coolest?
Chapter 11 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
Ch. 11.1 - Prob. 11.1CYUCh. 11.2 - Prob. 11.2CYUCh. 11.3 - Prob. 11.3CYUCh. 11.4 - Prob. 11.4CYUCh. 11 - Prob. 1QAPCh. 11 - Prob. 2QAPCh. 11 - Prob. 3QAPCh. 11 - Prob. 4QAPCh. 11 - Prob. 5QAPCh. 11 - Prob. 6QAP
Ch. 11 - Prob. 7QAPCh. 11 - Prob. 8QAPCh. 11 - Prob. 9QAPCh. 11 - Prob. 10QAPCh. 11 - Prob. 11QAPCh. 11 - Prob. 12QAPCh. 11 - Prob. 13QAPCh. 11 - Prob. 14QAPCh. 11 - Prob. 15QAPCh. 11 - Prob. 16QAPCh. 11 - Prob. 17QAPCh. 11 - Prob. 18QAPCh. 11 - Prob. 19QAPCh. 11 - Prob. 20QAPCh. 11 - Prob. 21QAPCh. 11 - Prob. 22QAPCh. 11 - Prob. 23QAPCh. 11 - Prob. 24QAPCh. 11 - Prob. 25QAPCh. 11 - Prob. 26QAPCh. 11 - Prob. 27QAPCh. 11 - Prob. 28QAPCh. 11 - Prob. 29QAPCh. 11 - Prob. 30QAPCh. 11 - Prob. 31QAPCh. 11 - Prob. 32QAPCh. 11 - Prob. 33QAPCh. 11 - Prob. 34QAPCh. 11 - Prob. 35QAPCh. 11 - Prob. 36QAPCh. 11 - Prob. 37QAPCh. 11 - Prob. 38QAPCh. 11 - Prob. 39QAPCh. 11 - Prob. 40QAPCh. 11 - Prob. 41QAPCh. 11 - Prob. 42QAPCh. 11 - Prob. 43QAPCh. 11 - Prob. 44QAPCh. 11 - Prob. 45QAP
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- If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength (in nm) does it radiate the most energy? Hint: Use Wien's law: ?max = 2.90 ✕ 106 nm · K T How does that compare with 91.2 nm, the wavelength of photons with just enough energy to ionize hydrogen? -The wavelength calculated above is shorter than 91.2 nm. Photons at this calculated wavelength will have more than enough energy to ionize hydrogen. -The wavelength calculated above is longer than 91.2 nm. Photons at this calculated wavelength will have more than enough energy to ionize hydrogen. -The wavelength calculated above is shorter than 91.2 nm. Photons at this calculated wavelength will not have enough energy to ionize hydrogen. -The wavelength calculated above is longer than 91.2 nm. Photons at this calculated wavelength will not have enough energy to ionize hydrogen.arrow_forwardWhat causes reddening of starlight? Explain how the reddish color of the Sun’s disk at sunset is caused by the same process.arrow_forwardIf our Sun were surrounded by a cloud of gas, would this cloud be an emission nebula? Why or why not?arrow_forward
- What factors resist the contraction of a cloud of interstellar matter?arrow_forwardWhat is the relationship between the color of a reflection nebula and the color of the star that illuminates it?arrow_forwardPlease give answer. Describe, with the aid of suitable diagrams, the basic structure and components of the ATLAS detector at the LHC.arrow_forward
- Given that the solar spectrum corresponds to a temperature of 5800 K and peaks at a wavelength of 500 nm, use Wien's law to determine the wavelength corresponding to the peak of the black-body curve in the convection zone of the Sun, where the temperature is 105 Karrow_forwardTwo identical stars are moving in a circular orbit around one another, with an orbital separation of 2 AU. The system lies 200 light years from Earth. If we happen to view the orbit head-on, how large (diameter) a telescope would we need to resolve the stars at visible wavelengths?arrow_forwardThe blackbody emission spectrum of object A peaks in the ultraviolet region of the electromagnetic spectrum at a wavelength of 200nm. That of object B peaks in the red region, at 650nm. Which object is hotter, and, according to Wien's law, how many times hotter is it? note: please solve this accurate please please accurate and exact answer..thanksarrow_forward
- What kind of object is the Messier Object M42, and where is it in the sky?arrow_forwardWhy can’t we use visible light telescopes to study molecular clouds where stars and planets form? Why do infrared or radio telescopes work better?arrow_forward5. The two images below show a portion of the Trifid Nebula. The image on the left was made with visible light, while the image on the right (shown to the same scale) is an infrared image from the Spitzer Space Telescope. Explain why the dark streaks in the visible-light image appear bright in the infrared image. (a) Reflection nebula, Dust lanes Emission nebula. R I 10 pc www V U X G (b) wwwwww R V U X Garrow_forward
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