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倒易律
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倒易律
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倒易律
感光化学的基本规律之一。从曝光公式可以看出,光照度和时间的量值可以互相置换,只要曝光量相同,感光片上得到的曝光效果应当是一致的。这种相互作用的关系,叫作倒易律。又称互易率。
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reciprocity law
倒易律
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