Physical basis of dermatologic radiotherapy
The frequency (v) is the number of waves passing a given point each second, or the number of vibrations per second.
The wavelength (λ) is the distance between two successive points in the wave that are characterized by the same phase of oscillation.
The velocity (c) is the distance the wave moves per second; it is a function of the frequency of the radiation and of the nature of the medium traversed. (In a vacuum or in air, all electromagnetic waves move at a speed of 299,793 km/sec, or 186,171 miles/sec.)
KeywordsField Size Skin Dose Absorb Dose Rate Depth Dose Radiation Quality
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