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Albeedo

Albeedo (ladina sõnast albedo 'valgesus') on pinna peegeldumisnäitaja.

Pinna albeedo väärtus on arv 0 ja 1 vahel, mis näitab peegelduva kiirguse intensiivsust võrreldes pealelangeva kiirgusega. Heleda pinna albeedo on suurem kui tumedal. Väljendatakse ka protsentides 0–100%.

Looduslike pindade albeedo jääb reeglina vahemikku 5–95%. Albeedo on tähtis füüsikaline suurus astronoomias ja meteoroloogias.

Paljude pindade puhul oleneb albeedo valguskiirte langemisnurgast. Näiteks merepinna albeedo võib muutuda vahemikus 2...99%, sõltuvalt sellest, kas Päike on seniidis või horisondil.

Planeedi Maa keskmine albeedo on 37%, Kuu albeedo aga 12%, seega on Kuu märksa tumedam taevakeha kui Maa.

Absoluutselt musta keha albeedo on null.

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Albeedo
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