• Lasers have numerous applications outside the physics lab.
  • These devices can be employed to measure distances accurately.
  • When the light beam strikes a solid object, it is reflected back and the device determines how far away the object is.
  • The Heisenberg Uncertainty Principle states that it is impossible to determine simultaneously both the position and the velocity of a particle.
  • Since photons and electrons have nearly the same energy, any attempt to locate an electron with a photon will knock the electron off course, resulting in uncertainty about where the electron is located.
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