Question

singel bhem spactometar​

Answer 1

Explanation:

In single beam spectrophotometers, a single beam of light passes through the sample holder. The instrument is standardized by placing a reference in the sample holder, and the resulting value is subtracted from subsequent sample measurements to remove effects from the solvent and the cell.

hope, it's ok..

Answer 2

A single beam spectrophotometer has only one beam of light, while a double beam spectrophotometer has two beams of light, one passing through a reference solution and one passing through the sample