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Author Question: A certain camera uses a double-convex lens made of glass with an index of refraction of 1.60. This ... (Read 114 times)

imanialler

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on: Jul 29, 2018
A certain camera uses a double-convex lens made of glass with an index of refraction of 1.60. This lens has a radius of curvature of magnitude 12 cm for the first surface and one of magnitude 24 cm for the second surface.
 
  What is the focal length of this lens?

Question 2

You need an inductor that will store 20 J of energy when a 3.0-A current flows through it. What should be its self-inductance?
 
  A) 4.4 H B) 90 H C) 3.7 H D) 60 H


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leeeep

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

13 cm

Answer to Question 2

A


imanialler

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

bblaney

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Reply 3 on: Yesterday
Wow, this really help

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