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Chapter 18: Mirrors and Lenses

Practice Test
      
  1.In a ray tracing diagram, two rays must pass through the __________ to determine the location of the image.  
  a.   image  
  b.   object  
  c.   focal point  
  d.   lens edge  
  Hint    
      
  2.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    
      
  3.The image produced by the ocular of a microscope is a(n) __________.  
  a.   real image  
  b.   virtual image  
  c.   object image  
  d.   reflected image  
  Hint    
      
  4.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.   between the focal point and twice the distance of the focal point  
  d.   twice the distance of the focal point  
  Hint    
      
  5.The image from a convex mirror will _________.  
  a.   never be virtual  
  b.   always be virtual  
  c.   always be real  
  d.   always be projected  
  Hint    
      
  6.Farsightedness can be corrected with a __________.  
  a.   concave lens  
  b.   convex lens  
  c.   parabolic lens  
  d.   plane lens  
  Hint    
      
  7.What is f if you have an object 2.0 m from the concave mirror, and the image is 4.0 m from the mirror?  
  a.   4.0 m  
  b.   1.3 m  
  c.   0.67 m  
  d.   2.0 m  
  Hint    
      
  8.Spherical aberration can be avoided by using a __________.  
  a.   plane mirror  
  b.   parabolic mirror  
  c.   spherical mirror  
  d.   convex mirror  
  Hint    
      
  9.A __________ image is formed when light rays converge and pass through the image.  
  a.   real  
  b.   convex  
  c.   virtual  
  d.   critical  
  Hint    
      
  10.A concave lens is also known as a __________ lens.  
  a.   plane  
  b.   concave  
  c.   diverging  
  d.   converging  
  Hint    

 
   
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