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Chapter 18: Mirrors and Lenses

Practice Test
      
  1.__________ is located behind a convex mirror.  
  a.   A real image  
  b.   A ray  
  c.   The focal point  
  d.   The object  
  Hint    
      
  2.In nearsightedness, the image is focused __________.  
  a.   directly on the retina  
  b.   in front of the eye  
  c.   beyond the retina  
  d.   in front of the retina  
  Hint    
      
  3.You are standing in front of a bathroom mirror. Where is your image located?  
  a.   behind you  
  b.   behind the mirror  
  c.   between you and the mirror  
  d.   in front of the mirror  
  Hint    
      
  4.__________ single lenses have chromatic aberration  
  a.   All  
  b.   Only parabolic  
  c.   Only convex  
  d.   Only concave  
  Hint    
      
  5.Real images produced by mirrors have __________ magnification.  
  a.   negative  
  b.   opposite  
  c.   positive  
  d.   massive  
  Hint    
      
  6.What does the F on a ray diagram represent?  
  a.   the focal point  
  b.   the location of the virtual image  
  c.   the center of the mirror  
  d.   the location of the object  
  Hint    
      
  7.The image produced by the ocular of a microscope is a(n) __________.  
  a.   reflected image  
  b.   object image  
  c.   virtual image  
  d.   real image  
  Hint    
      
  8.Farsightedness can be corrected with a __________.  
  a.   parabolic lens  
  b.   convex lens  
  c.   concave lens  
  d.   plane lens  
  Hint    
      
  9.Why are bigger lenses better for observing dim objects?  
  a.   they collect more light  
  b.   they refract light less  
  c.   they have better curvatures  
  d.   they reduce spherical aberration  
  Hint    
      
  10.In a concave mirror, an object placed __________ will result in a virtual image.  
  a.   between the focal point and mirror  
  b.   past the focal point  
  c.   twice the distance of the focal point  
  d.   between the focal point and twice the distance of the focal point  
  Hint    

 
   
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