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Mirrors and Lenses

Practice Test
      
  1.The transparent covering on the human eyeball is called the __________.  
  a.   iris  
  b.   retina  
  c.   lens  
  d.   cornea  
  Hint    
      
  2.Which of the following mirror shapes forms a real image?  
  a.   spherical  
  b.   convex  
  c.   plane  
  d.   concave  
  Hint    
      
  3.The distance from the center of the mirror to the focal point is called the _________.  
  a.   optical axis  
  b.   optical length  
  c.   focal point  
  d.   focal length  
  Hint    
      
  4.What type of image does a microscope form?  
  a.   virtual enlarged  
  b.   real enlarged  
  c.   virtual diminished  
  d.   real diminished  
  Hint    
      
  5.A _________ mirror is curved inward.  
  a.   conical  
  b.   concave  
  c.   convex  
  d.   plane  
  Hint    
      
  6.A _________ mirror is a flat, smooth mirror.  
  a.   plane  
  b.   concave  
  c.   convex  
  d.   spherical  
  Hint    
      
  7.What happens to light rays emitted from a light source?  
  a.   They travel in curved paths.  
  b.   They follow the paths of Earth's magnetic field lines.  
  c.   They remain concentrated at the light source.  
  d.   They spread out from the light source.  
  Hint    
      
  8.The __________ is the inner lining of your eye that has cells for converting light into electrical signals.  
  a.   sclera  
  b.   retina  
  c.   cornea  
  d.   optic nerve  
  Hint    
      
  9.What structure carries electrical signals from the retina to the brain to be interpreted?  
  a.   sclera  
  b.   focal point  
  c.   cornea  
  d.   optic nerve  
  Hint    
      
  10.Which of these describes a real image?  
  a.   Rays diverge as they are reflected from the mirror.  
  b.   Rays of light meet at the image.  
  c.   The image is formed by a plane mirror.  
  d.   No light rays pass through the image.  
  Hint    
      
  11.Which of the following does your brain perceive even though no light rays pass through it?  
  a.   lens  
  b.   real image  
  c.   virtual image  
  d.   mirror  
  Hint    
      
  12.What kind of lens is helpful to nearsighted people?  
  a.   concave  
  b.   plane  
  c.   flat  
  d.   convex  
  Hint    
      
  13.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.   the angle of incidence is equal to the angle of reflection  
  d.   light waves change their speed when they move from one medium into another  
  Hint    
      
  14.A _________ mirror is curved outward.  
  a.   convex  
  b.   concave  
  c.   plane  
  d.   spherical  
  Hint    
      
  15.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    
      
  16.What is the difference between a lens and a mirror?  
  a.   A mirror has no optical axis.  
  b.   Lenses reflect light, and light passes through mirrors.  
  c.   Mirrors reflect light, and light passes through lenses.  
  d.   A lens has no focal point.  
  Hint    
      
  17.What type of image is formed on the retina?  
  a.   upright real  
  b.   backwards  
  c.   upright virtual  
  d.   inverted  
  Hint    
      
  18.A __________ lens is thicker in the middle than at the edges.  
  a.   spherical  
  b.   concave  
  c.   convex  
  d.   plane  
  Hint    
      
  19.The __________ is an imaginary straight line perpendicular to the center of a concave mirror.  
  a.   tangent  
  b.   optical axis  
  c.   focal point  
  d.   ray  
  Hint    
      
  20.A __________ lens is thinner in the middle and thicker at the edges.  
  a.   spherical  
  b.   convex  
  c.   concave  
  d.   plane  
  Hint    

 
   
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