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Mirrors and Lenses

Practice Test
      
  1.Any smooth surface that reflects light to form an image is a(n) __________.  
  a.   optical axis  
  b.   lens  
  c.   mirror  
  d.   camera  
  Hint    
      
  2.The transparent covering on the human eyeball is called the __________.  
  a.   retina  
  b.   iris  
  c.   cornea  
  d.   lens  
  Hint    
      
  3.What kind of lens is helpful to nearsighted people?  
  a.   concave  
  b.   flat  
  c.   plane  
  d.   convex  
  Hint    
      
  4.Which of the following conditions occurs when the cornea is curved unevenly?  
  a.   blindness  
  b.   nearsightedness  
  c.   a stigmatism  
  d.   farsightedness  
  Hint    
      
  5.What type of image is formed on the retina?  
  a.   upright real  
  b.   backwards  
  c.   upright virtual  
  d.   inverted  
  Hint    
      
  6.What happens to light rays emitted from a light source?  
  a.   They spread out from the light source.  
  b.   They follow the paths of Earth's magnetic field lines.  
  c.   They remain concentrated at the light source.  
  d.   They travel in curved paths.  
  Hint    
      
  7.Which of these describes a real image?  
  a.   The image is formed by a plane mirror.  
  b.   No light rays pass through the image.  
  c.   Rays diverge as they are reflected from the mirror.  
  d.   Rays of light meet at the image.  
  Hint    
      
  8.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.   enlarged and inverted  
  c.   upright and enlarged  
  d.   inverted and smaller than the object  
  Hint    
      
  9.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    
      
  10.The __________ is the inner lining of your eye that has cells for converting light into electrical signals.  
  a.   cornea  
  b.   sclera  
  c.   retina  
  d.   optic nerve  
  Hint    
      
  11.Which of the following is required for your eye to see an object?  
  a.   a mirror  
  b.   air  
  c.   a telescope  
  d.   light coming from the object  
  Hint    
      
  12.What type of image does a microscope form?  
  a.   virtual diminished  
  b.   real diminished  
  c.   virtual enlarged  
  d.   real enlarged  
  Hint    
      
  13.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    
      
  14.A __________ lens is thinner in the middle and thicker at the edges.  
  a.   spherical  
  b.   convex  
  c.   concave  
  d.   plane  
  Hint    
      
  15.Which of the following uses a concave mirror?  
  a.   space telescope  
  b.   reflecting telescope  
  c.   refracting telescope  
  d.   telephoto lens  
  Hint    
      
  16.A _________ mirror is curved outward.  
  a.   concave  
  b.   convex  
  c.   spherical  
  d.   plane  
  Hint    
      
  17.Which of the following concave lenses forms a virtual image?  
  a.   object beyond three focal lengths  
  b.   object between two and three focal lengths  
  c.   object within one focal length  
  d.   object between one and two focal lengths  
  Hint    
      
  18.A _________ mirror is curved inward.  
  a.   plane  
  b.   concave  
  c.   convex  
  d.   conical  
  Hint    
      
  19.Which of the following mirror shapes forms a real image?  
  a.   plane  
  b.   convex  
  c.   spherical  
  d.   concave  
  Hint    
      
  20.A _________ mirror is a flat, smooth mirror.  
  a.   plane  
  b.   convex  
  c.   concave  
  d.   spherical  
  Hint    

 
   
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