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
거울에서의 정반사는 빛이 정확하게 반사되는 현상입니다.geoureseoui jeongbansaneun bich-i jeonghwakage bansadoeneun hyeonsang-imnida.The regular reflection in a mirror is the phenomenon where light is reflected accurately.