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Electromagnetic Spectrum
The amount of energy a photon has makes it sometimes behave more like a
wave and sometimes more like a particle. This is called the
"wave-particle duality" of light. It is important to understand that we
are not talking about a difference in what radiation IS, but only in how
it behaves. Low energy photons (such as radio) behave more like waves,
while higher energy photons (such as X-rays) behave more like
particles.
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