Test 4 Short Answer

• _____ frequency EM waves are more energetic and are more able to penetrate than ______ frequency waves?


  High, low
• What quantity measures the amount that an inductor impedes the current in an AC device?


  inductive reactance
• If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through it?


  2.05e8 m/s
• What is the angle of incidience?

  40 degrees
• The angle of incidence is equal to the angle of?


  reflection
• What is refraction?


  When light passes from one medium to another
• Resonance occurs in an AC series circuit when which of the following conditions is met?

  Capacitive reactance equal inductive reactance
• An electromagnetic wave is made up of which of the following oscillating quantities?

  Electric and magnetic fields
• Which one of the following scientists made the theoretical prediction that electromagnetic waves travel through a vacuum as the speed of light?

  Maxwell
• How is the direction of propagation of an electromagnetic wave oriented relative to the associated E and B fields?

  Perpendicular to both E and B
• Which of the following is NOT a way that light can travel to a source?


  None of the above
• What are 4 ways that light and matter can interact?

  Emission, transmission, absorption, reflection
• What speed do electromagnetic waves travel?

  The speed of light