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Author Question: Above about 80 km, the Sun's radiation ionizes the gases. What is this part of Earth's atmosphere ... (Read 24 times)

AEWBW

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on: Jul 27, 2018
Above about 80 km, the Sun's radiation ionizes the gases. What is this part of Earth's atmosphere called?
 
  A) The troposphere
  B) The stratosphere
  C) The mesosphere
  D) The ionosphere
  E) The magnetosphere

Question 2

Compare how doubling the diameter of a mirror will affect both resolution and light grasp.
 
  What will be an ideal response?


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wtf444

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

The resolution would now be twice as sharp, but the increase in surface area, with the squaring for the area, would now detect stars four times fainter than before.


AEWBW

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Reply 2 on: Jul 27, 2018
Wow, this really help

kjohnson

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Reply 3 on: Yesterday
Excellent

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