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14-26, 一光束由强度相同的自然光和线偏振光混合而成.此光束垂直入射到几个叠在一起的偏振片上. 问 (1) 欲使最后出振动方向垂直于原来入中线偏振光的振动方向,并且入中两种成分的光的出强相等,至少需要几个偏振片?它们的偏振化方向放置? (2) 这种情况下最后出强与入强的比值是多少?
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