If You Want to Check on What Conditions Were Like

question 23

Multiple Choice

If you want to check on what conditions were like in the universe a few hundred thousand years after the Big Bang, what sort of instrument would it be best to use:

• A) a gamma-ray or high-energy x-ray telescope in orbit
• B) a tank of chlorine deep inside the Earth
• C) a small refractor (which gathers visible light) on a college campus, but pointed in just the right direction
• D) an ultra-violet telescope in orbit around Jupiter
• E) a satellite with infrared and microwave telescopes on board

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Definitions:

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