Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
Chapter 18: Mirrors and Lenses

Practice Test
  1.A concave lens is also known as a __________ lens.  
  a.   concave  
  b.   converging  
  c.   diverging  
  d.   plane  
  2.Why are bigger lenses better for observing dim objects?  
  a.   they reduce spherical aberration  
  b.   they have better curvatures  
  c.   they collect more light  
  d.   they refract light less  
  3.What does the F on a ray diagram represent?  
  a.   the center of the mirror  
  b.   the location of the virtual image  
  c.   the focal point  
  d.   the location of the object  
  4.Spherical aberration can be avoided by using a __________.  
  a.   spherical mirror  
  b.   parabolic mirror  
  c.   convex mirror  
  d.   plane mirror  
  5.The focal length of a concave lens is __________.  
  a.   reduced  
  b.   positive  
  c.   magnified  
  d.   negative  
  6.In nearsightedness, the image is focused __________.  
  a.   in front of the eye  
  b.   directly on the retina  
  c.   beyond the retina  
  d.   in front of the retina  
  7.A 10-cm object has a 20-cm image. What is the magnification?  
  a.   10  
  b.   2  
  c.   1/2  
  d.   20  
  8.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.   2.0 m  
  b.   0.67 m  
  c.   1.3 m  
  d.   4.0 m  
  9.Which type of mirror produces an image that is always erect, always the same height as the object, and always virtual?  
  a.   plane  
  b.   concave  
  c.   convex  
  d.   diffuse  
  10.Real images produced by mirrors have __________ magnification.  
  a.   positive  
  b.   massive  
  c.   opposite  
  d.   negative  

McGraw-Hill / Glencoe
The McGraw-Hill Companies