Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
 
Mirrors and Lenses

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

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies