Which of the following surface is showing maximum albedo ?

Question

Accepted Answer

Fresh snow exhibits the maximum albedo among the given options because albedo is a measure of how much solar radiation a surface reflects. Fresh snow, due to its bright white color and crystalline structure, reflects a very high percentage of incoming sunlight, typically ranging from 80% to 95%. This high reflectivity means it absorbs very little solar energy, keeping the surface relatively cool.

Here's why the other options are incorrect:

1.  **Forest cover:** Forests have a relatively low albedo, typically ranging from 5% to 20%. The dark color of the vegetation absorbs a significant amount of solar radiation, rather than reflecting it.

2.  **Old snow:** Old snow has a lower albedo than fresh snow. As snow ages, it becomes compacted, dirtier, and its crystalline structure degrades. This results in a lower reflectivity, typically ranging from 40% to 70%, meaning it absorbs more solar radiation.

3.  **Road:** Roads, especially asphalt roads, have a very low albedo, usually around 5% to 10%. Their dark color absorbs a large amount of solar radiation, making them heat up significantly.

Therefore, fresh snow (Option 3) reflects the most solar radiation and thus has the highest albedo among the given choices.