Multiple choice

Infrared spectroscopy deals with the study of the interaction between infrared light & the matter. Which among the following is used in windows for infrared spectroscopy?

  1. Barium iodide

  2. Barium hydroxide

  3. Barium fluoride

  4. Barium oxide

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Barium fluoride (BaF2) is a chemical compound of barium and fluorine. It is transparent from the ultraviolet to the infrared, from 150-200 nm to 11-11.5 µm, and can be used as a material to make optical components such as lenses. It is used in windows for infrared spectroscopy, in particular in the field of fuel oil analysis.