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Telescopes quick check

A quick check of 3 questions. After you submit, each question shows the right answer and why.

3 of 9 questions, Advanced level. Aimed at the Advanced level, your current depth. Questions you have not answered yet come first.

Show all 9 questions

ScientistQuestion 1 of 3

Why are space telescopes such as Hubble and Webb reflectors rather than refractors?

ScientistQuestion 2 of 3

NASA gives Webb's primary mirror a collecting area of 25.37 m² and Hubble's 4.55 m². How many times more light does Webb collect? Give one decimal place.

AdvancedQuestion 3 of 3

A single radio dish has poor resolution compared with an optical telescope of the same size. Explain why, and how radio astronomers overcome it.