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Express all numeric answers in SI units unless otherwise instructed. Why is the index of refraction...

Express all numeric answers in SI units unless otherwise instructed.

  1. Why is the index of refraction always greater than or equal to 1?
  2. What is the relationship between the power of a lens and its focal length?
  3. (a) What is the power of a converging lens with focal length 12.0 cm? (b) What is the power of a diverging lens with focal length -22.0 cm?
  4. Can you start a fire with a converging lens? What about with a diverging lens? Explain.
  5. What is a real image? What type of lens must you use to create one?
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