extraordinary electromagnetic ray非寻常电磁射线
extraordinary light ray异常光线
extraordinary refracted ray异常折射线;非常折射光线
extraordinary ray spectrum非常光线光谱
principal index for extraordinary ray非常光线舟射率
N(名词) the plane-polarized ray of light that does not obey the laws of refraction in a doubly refracting crystal 非寻常光 [optics] → compare double refraction, ordinary ray