Answered: Problem 4: Oscar has an old-fashioned… | bartleby

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Problem 4: Oscar has an old-fashioned lantern projector that uses a candle and a lens to
project a slide onto the wall. The lens is 1.3 cm from the slide and projects an image onto a
screen 80 cm away. Oscar adds a lens to the original lens to allow him to project an image
onto a screen 30 cm away.
a. What is the power of the original lens?
b. What is the desired power of the combined lenses?
c. What power lens must Oscar add?

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