Chemca Chemistry Made Easy
Planck's Quantum Theory
Concept Quiz
The Planck-Einstein Relation
Classical physics modeled light as a continuous wave. Max Planck and Albert Einstein revolutionized physics by proving that electromagnetic energy is quantized—emitted and absorbed in indivisible discrete "packets" called photons.
$$E = h \nu = \frac{h c}{\lambda}$$
E = Energy of a single photon (Joules or eV)
h = Planck's Constant ($6.626 \times 10^{-34} \text{ J}\cdot\text{s}$)
c = Speed of Light ($3.0 \times 10^8 \text{ m/s}$)
ฮฝ = Frequency (Hz)
ฮป = Wavelength (m or nm)
h = Planck's Constant ($6.626 \times 10^{-34} \text{ J}\cdot\text{s}$)
c = Speed of Light ($3.0 \times 10^8 \text{ m/s}$)
ฮฝ = Frequency (Hz)
ฮป = Wavelength (m or nm)
Note: Visual representation of wave packets is a pedagogical model. Wavelength shapes and speeds in the animation are exaggerated for visual clarity.
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Super easy to understand.
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