Definition of REPROACH. 1. : an expression of rebuke or disapproval. 2. 3. a: a cause or occasion of blame, discredit, or disgrace b: discredit, disgrace. 4.
What is the difference between a spectrophotometer and a photometer? A photometer simply measure the total lumens of a light source, while a spectrophotometer will measure a whole spectral of that same light source.
A filter will absorb all light except for the color it is. So the only color a spectroscope can absorb after being red filtered is red. Same for green, blue, UV, etc... The only color that is allowed to flow through a filter is the color that the filter is. If it is red, Red goes through only.