concave parabolic mirror 中文意思是什麼
concave parabolic mirror
解釋
拋物線型凹面鏡-
A parabolic concave mirror can converge parallel light rays to its focus, and also collimate light rays that pass through its focus
拋物面凹鏡會把平行而來的光線聚集在一點焦點,亦會把源自焦點的光線平行向外反射。
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