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Mirrors and Lenses

Practice Test
      
  1.A _________ mirror is curved inward.  
  a.   convex  
  b.   conical  
  c.   plane  
  d.   concave  
  Hint    
      
  2.The __________ is an imaginary straight line perpendicular to the center of a concave mirror.  
  a.   tangent  
  b.   ray  
  c.   optical axis  
  d.   focal point  
  Hint    
      
  3.What is the difference between a lens and a mirror?  
  a.   A lens has no focal point.  
  b.   A mirror has no optical axis.  
  c.   Mirrors reflect light, and light passes through lenses.  
  d.   Lenses reflect light, and light passes through mirrors.  
  Hint    
      
  4.What type of image is formed on the retina?  
  a.   inverted  
  b.   upright real  
  c.   upright virtual  
  d.   backwards  
  Hint    
      
  5.What structure carries electrical signals from the retina to the brain to be interpreted?  
  a.   optic nerve  
  b.   sclera  
  c.   cornea  
  d.   focal point  
  Hint    
      
  6.A _________ mirror is curved outward.  
  a.   plane  
  b.   spherical  
  c.   convex  
  d.   concave  
  Hint    
      
  7.A __________ lens is thicker in the middle than at the edges.  
  a.   plane  
  b.   spherical  
  c.   concave  
  d.   convex  
  Hint    
      
  8.The __________ is the inner lining of your eye that has cells for converting light into electrical signals.  
  a.   retina  
  b.   sclera  
  c.   optic nerve  
  d.   cornea  
  Hint    
      
  9.What kind of lens is helpful to nearsighted people?  
  a.   convex  
  b.   plane  
  c.   flat  
  d.   concave  
  Hint    
      
  10.Which of the following uses a concave mirror?  
  a.   refracting telescope  
  b.   telephoto lens  
  c.   space telescope  
  d.   reflecting telescope  
  Hint    
      
  11.Which of the following mirror shapes forms a real image?  
  a.   concave  
  b.   convex  
  c.   plane  
  d.   spherical  
  Hint    
      
  12.The transparent covering on the human eyeball is called the __________.  
  a.   retina  
  b.   cornea  
  c.   iris  
  d.   lens  
  Hint    
      
  13.When an object is farther from a concave mirror than the focal point is, the image that is formed is __________.  
  a.   upright and enlarged  
  b.   upright and smaller than the object  
  c.   inverted and smaller than the object  
  d.   enlarged and inverted  
  Hint    
      
  14.Which of the following is required for your eye to see an object?  
  a.   a telescope  
  b.   air  
  c.   a mirror  
  d.   light coming from the object  
  Hint    
      
  15.The law of reflection states that __________.  
  a.   the angle of incidence is less than the angle of reflection  
  b.   the angle of incidence is greater that the angle of reflection  
  c.   light waves change their speed when they move from one medium into another  
  d.   the angle of incidence is equal to the angle of reflection  
  Hint    
      
  16.Which of the following does your brain perceive even though no light rays pass through it?  
  a.   real image  
  b.   mirror  
  c.   lens  
  d.   virtual image  
  Hint    
      
  17.What type of image does a microscope form?  
  a.   virtual diminished  
  b.   real enlarged  
  c.   virtual enlarged  
  d.   real diminished  
  Hint    
      
  18.The distance from the center of the mirror to the focal point is called the _________.  
  a.   focal length  
  b.   optical axis  
  c.   optical length  
  d.   focal point  
  Hint    
      
  19.Which of the following concave lenses forms a virtual image?  
  a.   object between two and three focal lengths  
  b.   object beyond three focal lengths  
  c.   object between one and two focal lengths  
  d.   object within one focal length  
  Hint    
      
  20.Which of the following conditions occurs when the cornea is curved unevenly?  
  a.   a stigmatism  
  b.   nearsightedness  
  c.   farsightedness  
  d.   blindness  
  Hint    

 
   
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