神马作文网Two people are each standing 3.0 m in front of a large plane
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Two people are each standing 3.0 m in front of a large plane mirror and are spaced 6.0 m apart.At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam will strike the other?
45°
根据光路的可逆性,连接两人的线段及光路,共同构成了一个等腰直角三角形,于是角度应为45°
根据光路的可逆性,连接两人的线段及光路,共同构成了一个等腰直角三角形,于是角度应为45°
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