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Chapter 18: Mirrors and Lenses

Practice Test
  1.In a ray tracing diagram, two rays must pass through the __________ to determine the location of the image.  
  a.   image  
  b.   object  
  c.   focal point  
  d.   lens edge  
  2.Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual?  
  a.   convex  
  b.   diffuse  
  c.   concave  
  d.   plane  
  3.The image produced by the ocular of a microscope is a(n) __________.  
  a.   real image  
  b.   virtual image  
  c.   object image  
  d.   reflected image  
  4.In a concave mirror, an object placed __________ will result in a virtual image.  
  a.   between the focal point and mirror  
  b.   past the focal point  
  c.   between the focal point and twice the distance of the focal point  
  d.   twice the distance of the focal point  
  5.The image from a convex mirror will _________.  
  a.   never be virtual  
  b.   always be virtual  
  c.   always be real  
  d.   always be projected  
  6.Farsightedness can be corrected with a __________.  
  a.   concave lens  
  b.   convex lens  
  c.   parabolic lens  
  d.   plane lens  
  7.What is f if you have an object 2.0 m from the concave mirror, and the image is 4.0 m from the mirror?  
  a.   4.0 m  
  b.   1.3 m  
  c.   0.67 m  
  d.   2.0 m  
  8.Spherical aberration can be avoided by using a __________.  
  a.   plane mirror  
  b.   parabolic mirror  
  c.   spherical mirror  
  d.   convex mirror  
  9.A __________ image is formed when light rays converge and pass through the image.  
  a.   real  
  b.   convex  
  c.   virtual  
  d.   critical  
  10.A concave lens is also known as a __________ lens.  
  a.   plane  
  b.   concave  
  c.   diverging  
  d.   converging  

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