On "Intensity enhancement in textured optical sheets for solar cells"

Recently, it has been proposed that, by the randomizing texturing of the surface of a sheet of material of refractive index
n
, the internal light intensity can be enhanced by a factor of up to
2n^{2}
. This proposal subsequently has been challenged with an enhancement of
8n
, argued to be the correct figure. The difference is shown to be due to an error in the latter argument. With the error removed, it also supports the original figure of
2n^{2}
enhancement.