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Home Q & A Board Science-Related Homework Help Physics Astronomy
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tempuser tempuser
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6 years ago
Light travels at speed c. Complete the following equation using only words: wave speed = _____________  ________________
 
  Fill in the blank(s) with correct word

Question 2

Luminosity class IV objects are known as ____________________.
 
  Fill in the blank(s) with correct word

Question 3

None of the pulsars emit pulses of visible light because
 
  a. pulsars are too hot to emit visible light.
  b. pulsars contain black holes that won't let visible light escape.
  c. the gravitational field of a pulsar is so great that the visible light emitted is redshifted.
  d. pulsars are too far away for the visible light to be bright enough to be detected at Earth.
  e. A few pulsars do emit visible light pulses.

Question 4

Electromagnetic radiation, or light, travels at speed ___________ m/s.
 
  Fill in the blank(s) with correct word

Question 5

____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class.
 
  Fill in the blank(s) with correct word
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RhondaUnicornRhondaUnicorn
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6 years ago
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tempuser Author
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6 years ago
Correct Slight Smile TY
gefa
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Yesterday
Good timing, thanks!
choih94
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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