according to a de:Wikipedia user:Rotkaeppchen68 it is according to an old german physics book like this:

there is a relationship between resistance R and illumination level E like this: $$R \sim E^{\frac{\log R_1 - \log R_2}{\log E_1 - \log E_2}}$$

According to a lengthy discussion in the German Wikipedia of user:Rotkaeppchen68 it is according to an old German physics book like this:

there is a relationship between resistance R and illumination level E like this: $$R \sim E^{\frac{\log R_1 - \log R_2}{\log E_1 - \log E_2}}$$

according to a de:Wikipedia user:Rotkaeppchen68 it is according to an old german physics book like this:

there is a relationship between resistance R and illumination level E like this: $$R \sim E^{\frac{\log R_1 - \log R_2}{\log E_1 - \log E_2}}$$

according to a de:Wikipedia user:Rotkaeppchen68 it is according to an old german physics book like this:

there is a relationship between resistance R and illumination level E like this: $$R \sim E^{\frac{\log R_1 - \log R_2}{\log E_1 - \log E_2}}$$