Question

The thickness of Ozone in a column air from the ground to the top of atmosphere is measure in terms of: 

(A) Dobson unit 

(B) Arab unit 

(C) Pascal unit 

(D) None of these

Answer 1

Correct Answer is: (A) Dobson unit 

• The Dobson Unit is a way to describe how much ozone there would be in the column if it were all squeezed into a single layer. 

• The average amount of ozone in the atmosphere is roughly 300 Dobson Units, equivalent to a layer 3 millimetres (0.12 inches) thick—the height of 2 pennies stacked together.