A: Why might a tall mountain top be a suitable place for infrared telescopes and

Question

A: Why might a tall mountain top be a suitable place for infrared telescopes and an infrared telescope at sea level would not work very well?

B: Why would an ultraviolet telescope not work very well on the Earth's surface, nor on the top of a mountain top?

C: Which star has the strongest balmer lines?

Star 1 is class M star

Star 2 is a class B star

Star 3 is a class A star

D: Star A and Star B both have an apparent magnitude of 4.0, but star A has an absolute magnitude of 1.0 and star B has an absolute magnitude of 7.0. Which statement is correct?

Star A and star B appear to have the same brightness, but star A is more luminous than star B

Star B appears brighter than star A, but actually star B and star A are equally luminous

Star A and star B appear to have the same brightness, but star B is more luminous than star A

Star A appears brighter than star B, but actually star B and star A are equally luminous

Explanation / Answer

A. A tall mountain top be a suitable place for infrared telescopes because you are above most of the carbon dioxide and water vapour in the region and an infrared telescope at sea level would not work very well because there is a carbon dioxide and water vapour present.

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