Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
흑체는 모든 파장의 복사를 흡수하는 이상적인 물체입니다.Heukcheun modeun pajang-ui boksareul hyubsuhaneun ideal-ui mulcheimnida.A blackbody is an ideal object that absorbs all radiation of all wavelengths.