Steradiano

Multi tool use
Steradiano estas mezurunuo de solida angulo. Ĝia simbolo estas sr. Se oni konsideras la sferan surfacon kun radiuso unu, kies centro troviĝas ĉe la vertico de tiu spaca angulo, kies grando estas unu, la sekcaĵo inter la sfera surfaco kaj la spaca angulo havas areon unu.

La limigita per cirklo parto de la sfera surfaco havas areon
r2 kie
r estas radiuso de la sfero. Tiel solida angulo de la parto de sfera surfaco estas unu steradiano.
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Ĉi tiu artikolo ankoraŭ estas ĝermo pri geometrio.
Helpu al Vikipedio plilongigi ĝin. Se jam ekzistas alilingva samtema artikolo pli disvolvita, traduku kaj aldonu el ĝi (menciante la fonton).
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asked 37 secs ago
Santosh Santosh
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