# Energy resolution of a homogeneous calorimeter

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## Summary:

Energy resolution of a homogeneous calorimeter

## Main Question or Discussion Point

Hi

I want to look at the energy resolution of a homogeneous calorimeter, in the literature I found that is given by
σ/E = a ⊕ b/√E ⊕ c/E and I found that the ⊕ means quadratic sum, what does quadratic sum mean?

Thanks
Aaron

## Answers and Replies

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Mentor
$\displaystyle a⊕b = \sqrt{a^2+b^2}$
Also known as sum in quadrature.