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Quizzes Quiz
Mirrors and Lenses

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

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