Excitation vs. ionization: two ways radiation interacts with atoms. Learn how each process works and why ionization is the key to understanding how radiation deposits dose in tissue.
Not all radiation is the same. Learn the key difference between particle and electromagnetic radiation — and why it shapes how we image, treat, and think about dose.
Atomic structure: the foundation of radiation physics. Learn how protons, neutrons, and electrons determine how radiation interacts with matter.
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