| 释义 |
凹面镜āomiànjìng球面镜的一种,反射面为凹面,焦点在镜前,当光源在焦点上,所发出的光反射后形成平行光束。{concave mirror; reflecting mirror with a concave spherical reflecting surface with its focus in front of it, and when the source of light is on the focus, the light reflected on the mirror's surface is converted into parallel rays;}也叫also凹镜{āojìng},会聚镜{huìjùjìng}。 |