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00:00 : generic 00:04 : What is absorbance? 01:16 : Absorbance & Colors 02:15 : color wheel 03:22 : complementary colors 04:08 : spectrophotometer 04:34 : What is Beer-Lambert's law? 06:34 : calibration line 07:08 : EXERCISES 07:18 : statement 07:37 : answer question 1 08:08 : other questions 08:41 : answers other questions