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ASTRO 1 EXAM 1 PENN STATE QUESTIONS AND ANSWERS 2024
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ASTRO 1 EXAM 1 PENN STATE QUESTIONS AND ANSWERS 2024
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ASTRO 1 EXAM 1 PENN STATEwhat temperature is the sun and where does the spectrum peak - ANSWERS-5800
kelvin and visible light region
what temp is room temp and where does a blackbody at room temp peak -
ANSWERS-300 kelvin and in the infrared
What kinds of radiation get through the Earth's atmosphere? - ANSWERS-visible
and radio
continuous spectrum - ANSWERS-light at all wavelengths
absorption lines - ANSWERS-dark lines in spectrum at certain
wavelengths superimposed on a continuous spectrum; produced by gas cloud in
front of light source
how are absorption lines produced - ANSWERS-produced when the electrons in
atoms absorb photons and remove light of specific energies from the spectrum.
Then the electrons move
from a lower to a higher energy level
emission lines - ANSWERS-bright lines at specific wavelengths
, due to emission of photons from a gas that has electrons in elevated levels
(excited gas)
how are emission lines formed - ANSWERS-produced when electrons jump
from higher to lower energy levels and emit photon of those specific energies
reflecting telescope - ANSWERS-concave mirror
refracting telescope - ANSWERS-convex lense
Important qualities of telescopes - ANSWERS-light gathering power, angular
resolution, and the quality of the instruments. The magnification not so
important.
how do telescopes collect light - ANSWERS-in proportion to the area of their
mirrors: Area of circle proportional to diameter squared.
Angular resolution - ANSWERS-can separate two nearby light
sources with good angular resolution = Earth's atmosphere limits angular
resolution "seeing" = makes stars twinkle
what does magnification do to the area viewed - ANSWERS-makes it smaller
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