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 picometer is one-trillionth of a meter.) They occupy the same region of the EM spectrum as hard X-rays. The only difference between them is their source: X-rays are produced by accelerating electrons, whereas gamma-rays are produced by atomic nuclei. This diagram shows the entire spectrum of electromagnetic waves.