名词
中文翻译：垂直入射
同义词：
['parallel incidence', 'perpendicular transmission']
例句：
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1. Thebeam of light is perpendicular to the surface of the glass.
光线与玻璃表面垂直。
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2. The wavefront must be perpendicular to the direction of propagation.
波前必须与传播方向垂直。
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3. The angle of incidence is crucial for determining the wavelength of light.
入射角对于确定光的波长至关重要。