Why light behaves as both a wave and a particle
In short: Light doesn't choose one identity; it adapts to how we measure it. This video explains the scale-dependent logic physicists use to determine which model of light is most appropriate for a given observation.
The duality of light is governed by scale. When the wavelength of light is comparable to the size of the object being studied, scientists employ a wave model. Conversely, when the energy involved corresponds to that of a single photon, a particle model becomes the standard framework.
Understanding this distinction matters because it reveals that 'wave' and 'particle' are not inherent properties of light itself, but rather descriptions of how light interacts with its environment at different scales.
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- Summary by Intellect · source: Wave-Particle Duality of Light
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