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The Planck Constant

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Questions and Answers

Which equation correctly expresses the relationship between a photon's energy, frequency, and the Planck constant?

$E = f + h$

$E = h - f$

$E = f - h$

$E = f \cdot h$ (correct)

Which constant is used, together with other constants, to define the kilogram, the SI unit of mass?

Reduced Planck constant

Planck constant (correct)

Mass-energy equivalence constant

Dirac constant

What is the value of the Planck constant expressed in SI units?

$6.62607015×10^{-34} \, \text{J} \cdot \text{s}^{-1}$

$6.62607015×10^{-34} \, \text{J} \cdot \text{C}^{-1}$

$6.62607015×10^{-34} \, \text{J} \cdot \text{Hz}^{-1}$ (correct)

$6.62607015×10^{-34} \, \text{J} \cdot \text{m}^{-1}$

Study Notes

Photon Energy and Frequency

The relationship between a photon's energy, frequency, and the Planck constant is expressed by a specific equation.
This equation demonstrates the connection between a photon's energy and its frequency, with the Planck constant being a crucial component.

Defining the Kilogram

The Planck constant is used, along with other constants, to define the kilogram, which is the SI unit of mass.
This highlights the significance of the Planck constant in the measurement of mass.

Planck Constant in SI Units

The value of the Planck constant expressed in SI units is a fundamental constant in physics.
This value is a crucial component in various calculations and equations, particularly in the context of photon energy and frequency.

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Description

Test your knowledge of the Planck constant and its significance in quantum mechanics with this informative quiz. Explore the relationship between energy, frequency, and mass as you delve into the fundamental concepts of this important physical constant.