Question Bank - General Knowledge

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Which one of the following land surfaces has the highest albedo?

A.
A snow covered mountain
B.
A barren rocky piedmont surface
C.
A sandy desert
D.
A mangrove forest

Solution:

The correct answer is A snow-covered mountain.Albedo effect:A body or a surface reflects a fraction of light which is called Albedo.There are two types of Albedo ‚¬œ terrestrial albedo and astronomical albedo.The normal albedo is called normal reflectance (a measure of a surfaces relative brightness when illuminated and observed vertically.)Albedo also varies according to the angle of incidence of the Sun Rays being higher for slating rays and lower for vertical or nearly vertical rays.From this, we can derive that albedo will be relatively higher during early morning and late evening because Sun rays are slanting at both times. Values of Albedo:?Albedo is higher in Snow or Ice.Fresh snow has the largest reflection and hence the highest albedo.The difference in the average albedo of Earth has an important influence on the temperature of the Earth.Black soil has the lowest albedo since it absorbs the maximum amount of solar radiation.

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