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Mirrors and Lenses

Practice Test
      
  1.What type of image does a microscope form?  
  a.   virtual enlarged  
  b.   virtual diminished  
  c.   real enlarged  
  d.   real diminished  
  Hint    
      
  2.A __________ lens is thinner in the middle and thicker at the edges.  
  a.   spherical  
  b.   concave  
  c.   convex  
  d.   plane  
  Hint    
      
  3.A _________ mirror is curved inward.  
  a.   convex  
  b.   plane  
  c.   conical  
  d.   concave  
  Hint    
      
  4.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    
      
  5.The law of reflection states that __________.  
  a.   the angle of incidence is greater that the angle of reflection  
  b.   the angle of incidence is less than 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    
      
  6.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    
      
  7.A __________ lens is thicker in the middle than at the edges.  
  a.   concave  
  b.   spherical  
  c.   convex  
  d.   plane  
  Hint    
      
  8.Which of the following is required for your eye to see an object?  
  a.   a mirror  
  b.   light coming from the object  
  c.   air  
  d.   a telescope  
  Hint    
      
  9.Which of these describes a real image?  
  a.   No light rays pass through the image.  
  b.   The image is formed by a plane mirror.  
  c.   Rays of light meet at the image.  
  d.   Rays diverge as they are reflected from the mirror.  
  Hint    
      
  10.A _________ mirror is curved outward.  
  a.   concave  
  b.   convex  
  c.   plane  
  d.   spherical  
  Hint    
      
  11.The distance from the center of the mirror to the focal point is called the _________.  
  a.   optical axis  
  b.   optical length  
  c.   focal length  
  d.   focal point  
  Hint    
      
  12.What kind of lens is helpful to nearsighted people?  
  a.   concave  
  b.   convex  
  c.   plane  
  d.   flat  
  Hint    
      
  13.Which of the following uses a concave mirror?  
  a.   telephoto lens  
  b.   refracting telescope  
  c.   space telescope  
  d.   reflecting telescope  
  Hint    
      
  14.Which of the following conditions occurs when the cornea is curved unevenly?  
  a.   nearsightedness  
  b.   blindness  
  c.   farsightedness  
  d.   a stigmatism  
  Hint    
      
  15.What is the difference between a lens and a mirror?  
  a.   A mirror has no optical axis.  
  b.   A lens has no focal point.  
  c.   Mirrors reflect light, and light passes through lenses.  
  d.   Lenses reflect light, and light passes through mirrors.  
  Hint    
      
  16.A _________ mirror is a flat, smooth mirror.  
  a.   spherical  
  b.   convex  
  c.   plane  
  d.   concave  
  Hint    
      
  17.What structure carries electrical signals from the retina to the brain to be interpreted?  
  a.   optic nerve  
  b.   focal point  
  c.   cornea  
  d.   sclera  
  Hint    
      
  18.Which of the following mirror shapes forms a real image?  
  a.   concave  
  b.   spherical  
  c.   convex  
  d.   plane  
  Hint    
      
  19.Any smooth surface that reflects light to form an image is a(n) __________.  
  a.   optical axis  
  b.   camera  
  c.   lens  
  d.   mirror  
  Hint    
      
  20.The __________ is an imaginary straight line perpendicular to the center of a concave mirror.  
  a.   tangent  
  b.   optical axis  
  c.   ray  
  d.   focal point  
  Hint    

 
   
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