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Quiz 1

Question 1: Refracting telescopes are based on _________ .

      a)  lenses
      b)  mirrors 
   Ans:  lenses

Question 2: The biggest optical telescopes in the world are ___________ .

      a) refractors 
      b) reflectors
   Ans:  reflectors

Question 3: Astronomers need big telescopes in order to _____________ .

      a) magnify objects
      b) collect more light
   Ans:  collect more light