Question

Ozone layer protects us from:

• A. Infrared rays
• B. Visible light
• C. Ultraviolet rays
• D. X-rays

Hint:

Ozone ($O_3$) is "good" up high in the stratosphere (protection) but "bad" down low in the troposphere (it acts as a pollutant and smog).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The ozone layer is a region of high ozone ($O_3$) concentration in the Earth's stratosphere. It acts as a shield for the planet.
Step 2: Detailed Explanation:
The ozone layer absorbs the majority (about 97-99%) of the Sun's medium-frequency Ultraviolet (UV) radiation. Without this protection, high levels of UV rays would cause skin cancer, cataracts, and damage to crops and marine life.
Step 3: Final Answer:
The correct option is (c).