AP Physics B Practice Exam

Category - Introductory Physics

Some campers are sitting around a campfire outside their tent. Which product of the fire is in the form of electromagnetic waves? 
  1. light
  2. smoke
  3. sound
  4. water vapor
Explanation
Answer: A - light

The terms light, electromagnetic waves, and radiation all refer to the same physical phenomenon: electromagnetic energy. This energy can be described by frequency, wavelength, or energy. 
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