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Author Question: The focal length of a concave mirror has a magnitude of 20 cm. What is its radius of curvature? ... (Read 27 times)

Redwolflake15

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on: Jul 29, 2018
The focal length of a concave mirror has a magnitude of 20 cm. What is its radius of curvature?
 
  A) 10 cm
  B) 40 cm
  C) -40 cm
  D) 20 cm
  E) -20 cm

Question 2

When a person with a near point at 28 cm uses a certain magnifying glass, it produces an angular magnification of 7.0 with the image very distant. What is the focal length of the lens of this magnifying glass?
 
  A) 2.0 cm
  B) 3.0 cm
  C) 4.0 cm
  D) 5.0 cm
  E) 6.0 cm


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morrie123456

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

C


Redwolflake15

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  • Posts: 569
Reply 2 on: Jul 29, 2018
Wow, this really help

phuda

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Reply 3 on: Yesterday
Excellent

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