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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  
  2.__________ single lenses have chromatic aberration  
  a.   Only convex  
  b.   Only concave  
  c.   All  
  d.   Only parabolic  
  3.The image from a convex mirror will _________.  
  a.   always be projected  
  b.   never be virtual  
  c.   always be real  
  d.   always be virtual  
  4.A concave lens is also known as a __________ lens.  
  a.   plane  
  b.   diverging  
  c.   converging  
  d.   concave  
  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  
  6.The distance from the focal point to the mirror is the __________.  
  a.   focal length  
  b.   focal distance  
  c.   foci  
  d.   focus point  
  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  
  8.Real images produced by mirrors have __________ magnification.  
  a.   positive  
  b.   massive  
  c.   negative  
  d.   opposite  
  9.A __________ image is formed when light rays converge and pass through the image.  
  a.   critical  
  b.   virtual  
  c.   real  
  d.   convex  
  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  

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