Whatisthetemperatureofthis star a5000kelvin

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: d angular resolution of the Arecibo telescope at this wavelength? (A) 25 arcseconds (B) 45 arcseconds (C) 1.5 arcminutes (D) 34 arcminutes (E) 1.25 degrees 8. A refracting telescope has an objective lens with a focal length of 0.5 meters. If the telescope has a magnification of 10, what is the focal length of the eyepiece? (A) 2.5 (mm) (B) 5 (mm) (C) 10(mm) (D) 25 (mm) (E) 50 (mm) 9. The spectrum of a star peaks at a wavelength of 290 nanometers. What is the temperature of this star? (A) 5000 Kelvin (B) 10,000 Kelvin (C) 15,000 Kelvin (D) 20,000 Kelvin (E) 25,000 Kelvin 10. In a laboratory, a prominent absorption line of sodium shows up at a wavelength of 589 nanometers. In the spectrum of a distant star, this same line shows up at a wavelength of 591 nanometers. What does this tell you about that star? (A) Its surface temperature is hot enough to ionize the sodium atoms in its atmosphere. (B) The star is moving towards Earth (C) The sodium atoms in the stars atmosphere contain additional neutrons in their nuclei (D) The star is moving away from Earth (E) The star is cold enough that the sodium atoms in its atmosphere have combined with chlorine atoms to form sodium chloride. 11. An electron in a hydrogen atom drops from the n=4 state to the n=3 state and emits a photon. What is the wavelength of this photon? (A) 1870 (nm) (B) 1280 (nm) (C) 820 (nm) (D) 2250...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern