Do You Know Astronomy? Play This Quiz

54 Questions | Total Attempts: 891

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Do You Know Astronomy? Play This Quiz

Chapter four and five of the astronomy book we are using covers a lot of information that needs to be remembered before the midterms and the quiz below will help you understand the concepts a little better. Give it a shot to refresh your memory and share it with classmates.


Questions and Answers
  • 1. 
    ______________ has (have) wavelengths that are longer than visible light.
    • A. 

      Gamma Rays

    • B. 

      Ultraviolet Light

    • C. 

      Infrared Radiation

    • D. 

      X Rays

    • E. 

      A, B, and D above.

  • 2. 
    Star C and star D are equally luminous. Star C is twice as far away from Earth as star D. How do the brightness level of stars C and D compare?
    • A. 

      Star D appears twice as bright as star C

    • B. 

      Star C appears twice as bright as star D

    • C. 

      Star C appears four times as bright as star D

    • D. 

      Star D appears four times as bright as star C

  • 3. 
    You research the star Sirius and find that its spectral lines are blue shifted. What does this tell you about Sirius?
    • A. 

      It has a transverse velocity that is toward us.

    • B. 

      Its surface temperature is higher than that of the Sun.

    • C. 

      It has a radial velocity that is toward us.

    • D. 

      It has a radial velocity that is away from us.

    • E. 

      It has a transverse velocity that is away from us.

  • 4. 
    The wavelength of maximum intensity that is emitted by a black body is
    • A. 

      Proportional to temperature

    • B. 

      Inversely proportional to temperature

    • C. 

      Proportional to temperature to the fourth power

    • D. 

      Inversely proportional to temperature to the fourth power

    • E. 

      Both a and c above

  • 5. 
    Of the following, which color represents the lowest surface temperature star?
    • A. 

      Yellow

    • B. 

      Blue

    • C. 

      Orange

    • D. 

      Red

    • E. 

      White

  • 6. 
    Ultraviolet radiation is hard to observe primarily because
    • A. 

      The Earth's atmosphere easily absorbs it at the upper atmosphere

    • B. 

      Very few objects emit at ultraviolet wavelengths

    • C. 

      No space-based telescopes operate at ultraviolet wavelengths

    • D. 

      Only the lowest mass stars emit ultraviolet light

  • 7. 
    The ________________ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
    • A. 

      Spherical Aberration

    • B. 

      Focal Length

    • C. 

      Resolving Power

    • D. 

      Magnifying Power

    • E. 

      Light-Gathering Power

  • 8. 
    Radio telescopes are often connected together to do interferometry. What is the primary problem overcome by radio interferometry?
    • A. 

      Poor light gathering power.

    • B. 

      Poor resolving power.

    • C. 

      Poor magnifying power.

    • D. 

      Interference from nearby sources of radio waves.

    • E. 

      The low energy of radio photons.

  • 9. 
    The Arecibo Observatory is:
    • A. 

      A radio observatory

    • B. 

      An adaptive optics observatory

    • C. 

      An X-ray observatory

    • D. 

      A large optical observatory

  • 10. 
    What is the name of the effect when an electromagnetic wave is bent as it passes from one material into another?
    • A. 

      Defraction

    • B. 

      Refraction

    • C. 

      Red Shift

    • D. 

      Reflection

  • 11. 
    The entire electromagmetic spectrum can be divided into the seven bands of Radio, Microwave, Infrared, Visivle, Ultraviolet, X-ray, and Gamma-ray (from longest to shortest wavelength). To which of these two bands is Earth's atmosphere the most transparent?
    • A. 

      Visible and Ultraviolet

    • B. 

      Visible & Radio

    • C. 

      Microwave & Radio

    • D. 

      Ultraviolet & Infrared

    • E. 

      X-ray & Gamma-ray

  • 12. 
    Which electron energy level transition corresponds to a hydrogen atom absorbing a visible-light photon that has a wavelength of 656 nanometers?
    • A. 

      The electron makes the transition from energy level 3 to energy level 2.

    • B. 

      The electron makes the transition from energy level 2 to energy level 3.

    • C. 

      The electron makes the transition from energy level 2 to energy level 1.

    • D. 

      The electron makes the transition from energy level 1 to energy level 2.

    • E. 

      The electron makes the transition from energy level 3 to energy level 4.

  • 13. 
    The reason to prefer a reflecting over a refracting telescope is its
    • A. 

      Lack of chromatic aberration

    • B. 

      Shorter length for the same aperture size

    • C. 

      Lighter weight for larger apertures

    • D. 

      All of the above are valid reasons

  • 14. 
    Particle accelerators that smash atoms or particles together at high speeds, such as Fermilab or CERN, are important tools used for simulating conditions in
    • A. 

      The solar wind

    • B. 

      Planetary nebula

    • C. 

      The early universe

    • D. 

      Brown dwarf stars

  • 15. 
    The lowest energy level in an atom is
    • A. 

      The absolute zero temperature.

    • B. 

      The ground state.

    • C. 

      The ionization level.

    • D. 

      Responsible for Doppler shifts.

    • E. 

      The energy level from which the Paschen Series of hydrogen originates.

  • 16. 
    Ultraviolet radiation from a star
    • A. 

      Will not penetrate Earth's atmosphere and reach the ground.

    • B. 

      Has a wavelength that is longer than the visible light emitted by the star.

    • C. 

      Has a wavelength that is shorter than the X-rays emitted by the star.

    • D. 

      A and b

    • E. 

      B and c

  • 17. 
    What is the wavelength of the longest wavelength light visible to the human eye?
    • A. 

      400 nm

    • B. 

      7000 nm

    • C. 

      3x108 m

    • D. 

      700 nm

  • 18. 
    If light from a star passes from an excited low density gas seen against the dark background of space to your telescope and spectroscope, __________ spectrum results.
    • A. 

      A bright (emission) line

    • B. 

      Continuous

  • 19. 
    The most massive part of the atom is (are) the ___________which has (have) a ___________charge
    • A. 

      Electrons, negative

    • B. 

      Nucleus, negative

    • C. 

      Nucleus, positive

    • D. 

      Electrons, positive

  • 20. 
    A plot of the continuous spectra of five different stars is shown in the figure below. Based on these spectra, which of the stars is the hottest?
    • A. 

      Star D

    • B. 

      Star C

    • C. 

      Star E

    • D. 

      Star A

  • 21. 
    If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope, _____________ spectrum on the continous spectrum results.
    • A. 

      A dark (absorption) line

    • B. 

      A bright (emission) line

    • C. 

      Continuous

  • 22. 
    The visible part of the electromagnetic spectrum can be divided into six color bands of Red, Orange, Yellow, Green, Blue and Violet (from long to short wavelength). A single photon of which of these colors has the greatest amount of energy?
    • A. 

      Green

    • B. 

      Violet

    • C. 

      Red

    • D. 

      Blue

    • E. 

      Orange

  • 23. 
    The fact that the speed of light is constant (as it travels through a vacuum) means that
    • A. 

      Photons with longer wavelengths have lower frequencies

    • B. 

      Radio wave photons have shorter wavelengths than gamma ray photons

    • C. 

      X-rays can be transmitted through the atmosphere around the world

    • D. 

      All of the above are true

  • 24. 
    The number of ___________ in the nucleus determines what element the nucleus is.
    • A. 

      Protons

    • B. 

      All of these determines the element

    • C. 

      Electrons

    • D. 

      None of these determines the element

    • E. 

      Neutrons

  • 25. 
    The emission and absorption lines of a given atom occur at the exact same energies.
    • A. 

      True

    • B. 

      False