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Author Question: Two campers wish to start a fire during the day. One camper is nearsighted and one is farsighted. ... (Read 108 times)

jon_i

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on: Jul 28, 2018
Two campers wish to start a fire during the day. One camper is nearsighted and one is farsighted. Whose glasses should be used to focus the Sun's rays onto some paper to start the fire?
  1.either campers
  2.the nearsighted campers
  3.the farsighted campers

Question 2

If laser light is reflected from a phonograph record or a compact disc, a diffraction pattern appears. This occurs because both devices contain parallel tracks of information that act as a reflection diffraction grating. Which device, record or compact disc, results in diffraction maxima that are farther apart?
  1.phonograph record
  2.compact disk


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Tonyam972

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Reply #1 on: Jul 28, 2018
Answer to Question 1

3

Answer to Question 2

2


jon_i

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Reply #2 on: Jul 28, 2018
Thanks


Tonyam972

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Reply #3 on: Jul 28, 2018
Welcome :)


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