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Author Question: A meniscus lens is made with the radius of curvature of the convex surface being 45.0 cm and the ... (Read 68 times)

Mollykgkg

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on: Jul 29, 2018
A meniscus lens is made with the radius of curvature of the convex surface being 45.0 cm and the concave surface 25.0 cm. If the glass used has index of refraction 1.50, what is the focal length of this lens?
 
  A)
 
  32 cm
  B)
 
  113 cm
  C)
 
  25.0 cm
  D)
 
  -32 cm
  E)
 
  -113 cm

Question 2

Compare insulators and conductors on the atomic level.
 
  What will be an ideal response?


leahchrapun

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

E

Answer to Question 2

From the atomic point of view, the electrons in an insulating material are bound very tightly to the nuclei. In a good conductor, on the other hand, some of the electrons are bound very loosely and can move about freely within the material and are often referred to as free electrons.


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