Multiple choice general knowledge science & technology

Which one of the following is used to measure ozone level in the atmosphere?

  1. By the number of ozone atoms in an atmospheric column, called Chapman unit

  2. By expressing the columnar density of Ozone in Dobson unit (thickness of ozone in an atmospheric column under standard temperature and pressure)

  3. By measuring the ultraviolet radiation level in the ground

  4. By measuring the Oxygen level in the Stratosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone levels are measured in Dobson Units (DU), representing the thickness of the ozone layer in a column compressed to standard temperature and pressure. 300 DU = 3mm thick layer. Chapman unit is not used for ozone measurement. Ground UV or oxygen measurements don't directly quantify ozone. This is standard atmospheric science.

Keep practicing — related questions