Department of Natural Sciences

                                             Clayton College & State University

 

April 2, 2003

 

Physics 1112 – Quiz 8b

 

 

Name  __SOLUTION__________________________________

 

  1. How many 800-nm photons does it take to have the same total energy as four 200-nm photons?

 

    1. 2

 

    1. 4

 

    1. 8

 

    1. 16.     800-nm photons carry four time less energy each compared to 200-nm ones, hence we need four 800-nm photons for each 200-nm photon.

 

 

  1. Which of the following requires a physical medium to travel in?

 

    1. Light waves.

 

    1. Sound waves: Air, water, and so on.

 

    1. Radio waves.

 

    1. None of these.

 

  1. When light is incident on a smooth surface, the angle of incidence ordinarily

 

    1. Equals the angle of reflection.

 

    1. Doesn’t equal the angle of reflection.

 

    1. Equals the angle of refraction.

 

    1. None of these.