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 two sheets?
what is .9*.9?
To determine how much light is transmitted through two sheets of clear windowpane, we need to consider the light loss due to reflections.
Let's assume that each sheet of clear windowpane allows 90% of light to pass through. This means that 10% of light is lost through each individual sheet.
To calculate the total amount of light transmitted through two sheets, we first need to determine how much light is lost through each sheet.
Light loss through one sheet: 10% = 0.1
To find the actual light transmitted through one sheet, we subtract the light loss from 100%:
Light transmitted through one sheet: 100% - 10% = 90% = 0.9
Now, to calculate the total light transmitted through two sheets, we multiply the transmission percentages of each sheet:
Light transmitted through two sheets = Light transmitted through sheet 1 * Light transmitted through sheet 2
Light transmitted through two sheets = 0.9 * 0.9
Light transmitted through two sheets = 0.81
Therefore, when two sheets of clear windowpane are used, approximately 81% of light is transmitted, while the remaining 19% is either reflected or lost.