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Optics_book

Check your understanding

Exercise 1. Answer the questions.

      1. What do optical instruments use to modify light rays?

  1. What kinds of images can be formed by mirrors and lenses?

  2. What has influence upon the amount of bending?

  3. What is an advantage of a lens over a mirror?

  4. What is similar in microscopes, projectors and enlargers?

  5. What telescopes are used most often in everyday life?

  6. Why can reflecting telescopes be more powerful than refracting ones?

Exercise 2. Topics for discussion.

      1. What do you know about optical prisms?

      2. What can you tell about the use of telescopes?