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Chapter 18: Mirrors and Lenses

Practice Test
      
  1.When an object is placed between the focal point and a concave mirror, the rays __________.  
  a.   converge and sight lines converge and form a real image  
  b.   converge and sight lines diverge and form a virtual image  
  c.   diverge and sight lines converge and form a virtual image  
  d.   diverge and sight lines diverge and form a real image  
  Hint    
      
  2.__________ single lenses have chromatic aberration  
  a.   Only convex  
  b.   Only concave  
  c.   All  
  d.   Only parabolic  
  Hint    
      
  3.The image from a convex mirror will _________.  
  a.   always be projected  
  b.   never be virtual  
  c.   always be real  
  d.   always be virtual  
  Hint    
      
  4.A concave lens is also known as a __________ lens.  
  a.   plane  
  b.   diverging  
  c.   converging  
  d.   concave  
  Hint    
      
  5.Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual?  
  a.   convex  
  b.   diffuse  
  c.   concave  
  d.   plane  
  Hint    
      
  6.The distance from the focal point to the mirror is the __________.  
  a.   focal length  
  b.   focal distance  
  c.   foci  
  d.   focus point  
  Hint    
      
  7.You are standing in front of a bathroom mirror. Where is your image located?  
  a.   behind you  
  b.   between you and the mirror  
  c.   behind the mirror  
  d.   in front of the mirror  
  Hint    
      
  8.Real images produced by mirrors have __________ magnification.  
  a.   positive  
  b.   massive  
  c.   negative  
  d.   opposite  
  Hint    
      
  9.A __________ image is formed when light rays converge and pass through the image.  
  a.   critical  
  b.   virtual  
  c.   real  
  d.   convex  
  Hint    
      
  10.The refractive indices of lenses are __________.  
  a.   greater than air  
  b.   independent of the refractive index of air  
  c.   the same as air  
  d.   less than air  
  Hint    

 
   
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