Question

What is the approximate average Albedo of the Earth?

• A. 0.1
• B. 0.3
• C. 0.5
• D. 0.7

Hint:

\textbf{Earth's albedo ≈ 0.3 (30% reflected, 70% absorbed)}.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Albedo is the measure of the reflectivity of a surface. It is the ratio of reflected solar radiation to incoming solar radiation.
Step 2: Detailed Explanation:
Values range from 0 (perfect absorber) to 1 (perfect reflector).
The Earth's albedo is a combination of reflections from clouds, the atmosphere, and the surface (ice, land, ocean).
Clouds contribute the most significantly to global albedo.
The accepted average planetary albedo of Earth is approximately 0.3 or 30%.
Step 3: Final Answer:
The average Albedo of Earth is 0.3.