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Mirrors and Lenses

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

 
   
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