No glass is perfectly transparent. Mainly because of reflections, about 90% of light passes through an average sheet of clear windowpane. The 10% loss is not noticed through a single sheet, but through several sheets it is apparent. How much light is transmitted by three sheets?
(0.9)^3
Get out your calculator.
65.6
To calculate the amount of light transmitted through three sheets of glass, we first need to consider the light loss through a single sheet of glass.
Given that about 90% of light passes through a single sheet, this means that the remaining 10% is lost. We can express this as a transmittance factor of 0.9 (90%).
To calculate the amount of light transmitted through multiple sheets of glass, we can simply multiply the transmittance factor of each sheet together. In this case, we have three sheets of glass, so we multiply 0.9 by itself three times:
0.9 * 0.9 * 0.9 = 0.729
Therefore, approximately 72.9% of light is transmitted through three sheets of glass.