STERADIAN

STERADIAN (az stereo… va radian), vohidi andozagirii kunji jismonist. Ishoratash sr. Steradian— kunji jismoniest, ki qullaash dar markazi sfera voqe gardida, dar on sathero judo mekunad, ki masohatash ba kvadrati radiusi sfera barobar ast. Sferai tom kunji jismoniero tashkil mekunad, ki ba 4ηsr. barobar meoyad.