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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Maria Maria
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6 years ago
A ____ has a few million light sensitive diodes in an array typically about a half-inch square.
 
  a. photometer
  b. charge-coupled device
  c. spectrograph
  d. photographic plate
  e. grating

Question 2

HII regions are found near stars cooler than 25,000 K because large amounts of ultraviolet photons would totally destroy the hydrogen atoms in the gas.
 
  Indicate whether the statement is true or false

Question 3

Astronomers build telescopes on tops of mountains because
 
  a. there is less air to dim the light.
  b. the seeing is better.
  c. CCDs work better when there is less oxygen in the air.
  d. all of the above
  e. a and b
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ben.kenobi24ben.kenobi24
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Maria Author
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6 years ago
Helped a lot
kaytee23
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This calls for a celebration Person Raising Both Hands in Celebration
7.prime7105
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Thanks
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