Which one of the following reflects back more sunlight as compared to other three?/निम्नलिखित में से कौन सा अन्य तीन की तुलना में अधिक सूर्य के प्रकाश को वापस परावर्तित करता है?
(1) Sand desert/रेत का रेगिस्तान
(2) Land covered with fresh snow/ ताजी बर्फ से ढकी भूमि
(3) Prairie land/प्रेयरी भूमि
(4) Paddy crop land/धान की फसल वाली भूमि
Answer / उत्तर :-
(2) Land covered with fresh snow/ ताजी बर्फ से ढकी भूमि
Explanation / व्याख्या :-
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth’s surface. Ice, especially with snow on top of it on land, has the highest albedo. The albedo of given sources is as follows:
* Fresh snow or ice: 60-90% or 80-95%;
* Desert sand: 30-50%;
*Prairie Grasslands: 18-25% or 20%;
* Crops: = 10-25%