OCR Medical Imaging equation for intensity

Hi, in my OCR A2 physics textbook it says that an equation for intensity is:
I = I₀e^-μx
where I₀ is the initial intensity,
μ is the attenuation coefficient
and x is the distance travelled through the medium

However, it doesn't say what 'e' is, I'm assuming that it's the energy of the photon but I'm not too sure. If anyone could clarify I'd be really grateful.
Thank you :smile:

Reply 1

Dynamo123

7

e=2.718. It is the base of system of natural log.

Reply 2

so it goes

OP

9

Original post by Dynamo123

e=2.718. It is the base of system of natural log.

Thank you

Reply 3

martynsteel

11

Original post by so it goes

Hi, in my OCR A2 physics textbook it says that an equation for intensity is:
I = I₀e^-μx
where I₀ is the initial intensity,
μ is the attenuation coefficient
and x is the distance travelled through the medium

However, it doesn't say what 'e' is, I'm assuming that it's the energy of the photon but I'm not too sure. If anyone could clarify I'd be really grateful.
Thank you :smile:

e is Eulers Number and as previously stated before it's the base of natural logarithms :smile:

OCR Medical Imaging equation for intensity

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