The calculation on area of the Fyesnel's half wave zone is not accurate in many teaching materials. The mistake is pointed out, and a correct solution is given.
指出了光学教材中，菲涅耳半波带面积计算中的不合理近似及其错误结论，并提出正确的解决方法。
The calculation on area of the Fyesnel's half wave zone is not accurate in many teaching materials. The mistake is pointed out, and a correct solution is given.
指出了光学教材中，菲涅耳半波带面积计算中的不合理近似及其错误结论，并提出正确的解决方法。
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