1. Why do optical astronomers often put their telescopes at the tops of mountains, while radio astronomers sometimes put their telescopes in deep valleys? 2. What are the advantages of making a telescope mirror thin? What problems does that cause? 3. Small telescopes are often advertised as “200 power” or “magnifies 200 times.” How would you improve such advertisements? 4. Why do radio telescopes have relatively poor resolving power?
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