The following is the unit of ozone

Options

A. db
B. dB
C. Sv
D. DU

Answer

To solve the question regarding the unit of ozone, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Ozone**: Ozone is a molecule composed of three oxygen atoms, represented chemically as O3. It is primarily found in the stratosphere, forming the ozone layer which protects the Earth from harmful ultraviolet (UV) radiation.

2. **Identify Measurement Units**: The concentration of ozone in the atmosphere is measured using specific units. The most commonly used unit for measuring the amount of ozone in the atmosphere is the Dobson Unit (DU).

3. **Define Dobson Unit**: One Dobson Unit is defined as the amount of ozone that would create a layer of pure ozone 0.01 millimeters thick at a temperature of 0 degrees Celsius and a pressure of one atmosphere. This unit helps quantify the total amount of ozone present in a column of the atmosphere.

4. **Average Ozone Layer Thickness**: The average thickness of the ozone layer is approximately 300 Dobson Units, which indicates the concentration of ozone present above the Earth's surface.

5. **Conclusion**: Based on the information gathered, the correct answer to the question "The following is the unit of ozone" is the Dobson Unit, represented as DU.

### Final Answer:
The unit of ozone is Dobson Unit (DU).

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