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No glass is perfectly transparent. Mainly because of reflections, about 92% of light passes through an average sheet of clear windowpane. The 8% loss is not noticed through a single sheet, but through several sheets, the loss is apparent. How much light is transmitted by a double-paned window (one with two sheets of glass)?

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Answer:

The light transmitted by a double-paned window is 84.6 % or approximately 85%

Explanation:

Each sheet of glass will cause a loss of light of 8 % (or it transmits 92%). If we assume that the sheets are all the same, we can say that the light that passes through the first sheet is 92% of the initial one.

Then, after the second sheet, the light that passes through is 92% of the light that passed through the first one, thus 92%x92% (0.92x0.02) or 84.6%.

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