Finding absroptivity (α) for Tauc plot datas, where does this formula ((4*3.14* absorbance)/wavelength) come from?

Hello, guys am really confused why some calculations use ((4*3.14* absorbance)/wavelength) and not ((2.303* absorbance)/ length) to find molar absorptivity to find data for Tauc plot? what is 4...

08 September 2021 2,479 0 View