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Author Question: A convex mirror has a focal length of -20 cm. What is the object distance if the image distance is ... (Read 76 times)

panfilo

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  • Posts: 572
on: Jul 28, 2018
A convex mirror has a focal length of -20 cm. What is the object distance if the image distance is -10 cm?
 a. 10 cm
  b. 40 cm
  c. 60 cm
  d. 20 cm
  e. 30 cm

Question 2

A concave mirror has a focal length of 20 cm. What is the magnification if the object's distance is 100 cm?
 a. 1/2
  b. 1/4
  c. -2
  d. 4
  e. -1/4


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wergv

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

D

Answer to Question 2

E


panfilo

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  • Posts: 572
Reply 2 on: Jul 28, 2018
Gracias!

ashely1112

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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