The Planck Constant Quiz

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Questions and Answers

What is the Planck constant?

  • The speed of light in a vacuum
  • The force required to move one unit of charge between two points in an electric field
  • The measure of the disorder or randomness in a closed system
  • A fundamental physical constant that is the quantum of action in quantum mechanics (correct)

What are the units of the Planck constant?

  • Meters per second
  • Kilograms
  • Watts
  • Joule-seconds (correct)

How does the Planck constant relate to energy and frequency?

  • It is inversely proportional to the energy of a photon and directly proportional to the frequency of the photon
  • It is directly proportional to the energy of a photon and inversely proportional to the frequency of the photon (correct)
  • It is directly proportional to both the energy and frequency of a photon
  • It has no relation to the energy and frequency of a photon

Flashcards

Planck constant

A fundamental physical constant that is the quantum of action in quantum mechanics.

Units of Planck constant

Joule-seconds (Jâ‹…s).

Planck constant: energy and frequency

It establishes a direct relationship between a photon's energy and its frequency. Energy is proportional, frequency is inverse.

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