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Author Question: Take the lens maker equation and show that a lens which has been turned around (surface 1 becomes 2 ... (Read 94 times)

nevelica

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on: Jul 27, 2018
Take the lens maker equation and show that a lens which has been turned around (surface 1 becomes 2 and 2 becomes 1 ) has the same focal length.
 
  What will be an ideal response?

Question 2

An emf is induced in a wire by changing the current in a nearby wire.
 
  Indicate whether the statement is true or false


abctaiwan

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Reply #1 on: Jul 27, 2018
Answer to Question 1

1/f=(n-1)(1/R1 - 1/R2 ) A sign change occurs when 1 and 2 are exchanged, and the radii themselves change sign because the center of curvature moves to other side of surface. These sign changes cancel each other out and yield the same f.

Answer to Question 2

TRUE


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