Question

The average thickness of the Ozone layer in India is:

• A. 100 Dobson
• B. 200 Dobson
• C. 300 Dobson
• D. 400 Dobson

Hint:

Ozone thickness is measured in Dobson Units (DU); 300 DU is a standard global average in many regions including India.

Answer 1

The Correct Option is C

1. Understanding the Ozone Layer:

The ozone layer is a protective layer in the Earth's stratosphere that absorbs most of the Sun's harmful ultraviolet (UV) radiation. Its thickness is measured in Dobson Units (DU), where 1 DU represents a 0.01 mm thickness of pure ozone at standard temperature and pressure.

2. Global vs. Regional Thickness:

The global average ozone thickness is about 300 Dobson Units. However, regional variations occur due to factors like latitude, altitude, and atmospheric conditions. Tropical regions (including parts of India) often have slightly lower ozone levels than mid-latitude or polar regions.

3. Ozone Thickness in India:

India, located near the tropics, typically has an average ozone layer thickness of 250–300 Dobson Units. While it can fluctuate seasonally, it rarely falls below 200 DU or exceeds 350 DU under normal conditions.

4. Evaluating the Options:

The given options are 100 DU, 200 DU, 300 DU, and 400 DU. Since 100 DU and 200 DU are unusually low (associated with ozone holes) and 400 DU is unrealistically high for India, the most accurate choice is 300 Dobson, aligning with global and regional averages.

5. Final Answer

The average thickness of the ozone layer in India is approximately 300 Dobson Units, reflecting typical tropical ozone levels.