โโก๐งฌโกโ
๐ก๐๐
๐งช๐๐
๐ก๐๐งช๐
๐ฆโก๏ธโฌ๐งโก๏ธ๐
โฌ๐ง๐ฆ
๐ก๐งช๐
#light attenuation #optical density #transmission #spectrophotometry #intensity decrease #sample analysis #light measurement