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en/13.4.7.md
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| $13.4.7.$ A beam of light of intensity I falls on a plane-parallel plate normal to its surface. Ignoring the absorption and assuming that the reflection coefficient of | |||
| light on each surface of the plate in any direction is equal to k, determine the | |||
| intensity of the beam that passed through it. | |||
| ### Solution | |||
| #### Answer | |||
| $I_0=\frac{1-k}{1+k} I_0$ | |||
| ещё строк без изменений 9 | |||
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| ### Statement | ### Statement | ||
| $13.4.7.$ A beam of light of intensity I falls on a plane-parallel plate normal to its surface. Ignoring the absorption and assuming that the reflection coefficient of | $13.4.7.$ A beam of light of intensity I falls on a plane-parallel plate normal to its surface. Ignoring the absorption and assuming that the reflection coefficient of | ||
| light on each surface of the plate in any direction is equal to k, determine the | light on each surface of the plate in any direction is equal to k, determine the | ||
| intensity of the beam that passed through it. | intensity of the beam that passed through it. | ||
| ### Solution | ### Solution | ||
| #### Answer | #### Answer | ||
| $I_0=\frac{1-k}{1+k} I_0$ | $I_0=\frac{1-k}{1+k} I_0$ | ||
| ещё строк без изменений 9 | |||