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Quizzes Quiz
Mirrors and Lenses

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

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