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Mirrors and Lenses

Practice Test
      
  1.Which of the following is required for your eye to see an object?  
  a.   a telescope  
  b.   a mirror  
  c.   air  
  d.   light coming from the object  
  Hint    
      
  2.A _________ mirror is a flat, smooth mirror.  
  a.   concave  
  b.   convex  
  c.   spherical  
  d.   plane  
  Hint    
      
  3.What kind of lens is helpful to nearsighted people?  
  a.   concave  
  b.   convex  
  c.   plane  
  d.   flat  
  Hint    
      
  4.Which of the following mirror shapes forms a real image?  
  a.   spherical  
  b.   concave  
  c.   convex  
  d.   plane  
  Hint    
      
  5.Which of the following uses a concave mirror?  
  a.   refracting telescope  
  b.   space telescope  
  c.   telephoto lens  
  d.   reflecting telescope  
  Hint    
      
  6.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.   enlarged and inverted  
  d.   upright and enlarged  
  Hint    
      
  7.The __________ is the inner lining of your eye that has cells for converting light into electrical signals.  
  a.   optic nerve  
  b.   cornea  
  c.   retina  
  d.   sclera  
  Hint    
      
  8.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    
      
  9.A _________ mirror is curved outward.  
  a.   convex  
  b.   concave  
  c.   plane  
  d.   spherical  
  Hint    
      
  10.A __________ lens is thicker in the middle than at the edges.  
  a.   convex  
  b.   concave  
  c.   plane  
  d.   spherical  
  Hint    
      
  11.The distance from the center of the mirror to the focal point is called the _________.  
  a.   optical length  
  b.   focal point  
  c.   optical axis  
  d.   focal length  
  Hint    
      
  12.The __________ is an imaginary straight line perpendicular to the center of a concave mirror.  
  a.   focal point  
  b.   optical axis  
  c.   ray  
  d.   tangent  
  Hint    
      
  13.Which of the following concave lenses forms a virtual image?  
  a.   object within one focal length  
  b.   object beyond three focal lengths  
  c.   object between one and two focal lengths  
  d.   object between two and three focal lengths  
  Hint    
      
  14.What is the difference between a lens and a mirror?  
  a.   Mirrors reflect light, and light passes through lenses.  
  b.   A lens has no focal point.  
  c.   Lenses reflect light, and light passes through mirrors.  
  d.   A mirror has no optical axis.  
  Hint    
      
  15.A _________ mirror is curved inward.  
  a.   concave  
  b.   conical  
  c.   convex  
  d.   plane  
  Hint    
      
  16.Which of the following does your brain perceive even though no light rays pass through it?  
  a.   real image  
  b.   mirror  
  c.   virtual image  
  d.   lens  
  Hint    
      
  17.A __________ lens is thinner in the middle and thicker at the edges.  
  a.   plane  
  b.   convex  
  c.   concave  
  d.   spherical  
  Hint    
      
  18.Any smooth surface that reflects light to form an image is a(n) __________.  
  a.   lens  
  b.   mirror  
  c.   camera  
  d.   optical axis  
  Hint    
      
  19.The transparent covering on the human eyeball is called the __________.  
  a.   retina  
  b.   cornea  
  c.   lens  
  d.   iris  
  Hint    
      
  20.What type of image does a microscope form?  
  a.   real diminished  
  b.   virtual enlarged  
  c.   real enlarged  
  d.   virtual diminished  
  Hint    

 
   
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