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Mirrors and Lenses

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

 
   
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