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2020-06-09View Original

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{"每日一题】이론적 기초2
Reply #22020-06-09
B. 自然光通过偏振片后成为偏振光,自然光通过偏振片后光强减半。偏振光的光强通过马吕斯定律计算:入射线偏振光的光强为I0,透过偏振化方向角度成α的偏振片后,透射光强(不计检偏器对光的吸收)为I,则,当α=0°或180°时,I=I0,投射光强最大,当α=90°或270°时,I=0,投射光强最小。设本题自然光光强为I0,透过第一个偏振片后光强变为I0/2,透过第二个偏振片后,透射光强为。本题问的是入射至第二个偏振片的光强,所以应为I0/2=2I。
Reply #32020-06-09
一束自然光垂直穿过两个偏振片,两个偏振片的偏振化方向成45°角。已知通过此两偏振片后的光强为I,则入射至第二个偏振片的线偏振光强度为:(

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