CAPE Physics Unit 2 · 2015 · Paper 1 · Question Q34
The intensity of X-rays passing through a material of thickness, x, is given by
\[I = I_0 e^{-\mu x}.\]
What does the symbol '\mu' in the equation represent?
- (A)The time constant of the X-rays
- (B)The permittivity of the material
- (C)The permeability of the material
- (D)The linear absorption coefficient of the material
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