Consider a beam of free particles with a certain speed v. If we double the speed, what happens to the deBroglie wavelength?
  • A. it increases by a factor of 2.
  • B. it increases by a factor of the square root of 2.
  • C. it remains the same
  • D. it decreases by a factor of 2.
  • E. it decreases by a factor of the square root of 2.