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
광전의 효과는 빛을 전기로 변환하는 것입니다.gwangjeon-ui hyogwa-neun bicheul jeongiro byeonhwanhaneun geos-ibnida.The photoelectric effect is the conversion of light into electricity.