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Chapter 17: Reflection and Refraction

Practice Test
  1.Blue light, which is bent more than red light in a prism, has __________.  
  a.   a shorter wavelength  
  b.   a lower frequency  
  c.   a faster speed  
  d.   a longer wavelength  
  2.The line perpendicular to the reflective surface is the __________.  
  a.   line of refraction  
  b.   line of reflection  
  c.   line of incidence  
  d.   normal  
  3.A light ray traveling through crown glass (n = 1.52) intersects a sheet of flint glass (n = 1.61) at an angle of 27.3°. What is the angle of refraction?  
  a.   25.7°  
  b.   0.433°  
  c.   0.839°  
  d.   33.0°  
  4.How does light normally travel?  
  a.   in concentric circles  
  b.   always toward a dark area  
  c.   in a straight line  
  d.   in a curved line  
  5.A ray of sunlight travels through air and intersects the surface of water at a small incident angle. The ray is __________.  
  a.   pure  
  b.   refracted  
  c.   reflected  
  d.   incident  
  6.Because of refraction, the Sun actually sets __________ we see it disappear.  
  a.   before  
  b.   after  
  c.   hours before  
  d.   at the same time as  
  7.According to Snell's law, light traveling from a vacuum to glass will __________.  
  a.   stop completely  
  b.   travel at the same speed  
  c.   slow down  
  d.   speed up  
  8.What is dispersion?  
  a.   the reflection of colored light  
  b.   the separation of light into its spectrum  
  c.   the refraction of light  
  d.   the combining of colored light into white light  
  9.Your image in a bathroom mirror results from __________.  
  a.   diffuse refraction  
  b.   diffuse reflection  
  c.   regular reflection  
  d.   regular refraction  
  10.Water is more optically dense than air. Therefore, the speed of light in water is __________.  
  a.   slower than the speed of light in air  
  b.   the same as the speed of light in a vacuum  
  c.   the same as the speed of light in air  
  d.   faster than the speed of light in air  

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