The ozone layer thickness is measured in
- ADecibels (dB)
- BDobson units (DU)Correct
- CBecquerel (Bq)
- DNone of the above
Solution
Concept
Dobson unit
Step-by-step solution
1. One Dobson unit is 0.01 mm of pure ozone at STP.
Explanation
Ozone column thickness is in DU.
Why the other options are wrong
dB is for sound and Bq for radioactivity.
Shortcut
Ozone = Dobson.
Correct answer: B) Dobson units (DU)