臨りん界かい角かくりんかいかくMeanings1nouncritical anglePhysics term for the angle of incidence above which total internal reflection occurs.光ひかりが水みずから空くう気きへ進すすむとき、臨りん界かい角かくは約やく48度どです。When light travels from water to air, the critical angle is about 48 degrees.
