transparent glass forum

no glass is perfectly transparent. mainly because of reflections, about 94% of light passes through an averag

bugga bugga , Tuesday, 10th of August 2010 04:35:14 AM

sheet of clear windowpane. The 6% loss is not noticed through a single 
bugga bugga
sheet, but through several sheets it is apparent. How much light is 
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transmitted by four sheets?
 
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Shorty , Wednesday, 11th of August 2010 09:12:54 PM

If you are right about the 94% then the correct math would be  
Shorty
 
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value of light V =  
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V x .94 x .94 x .94 X .94 = light through 4 panes of glass. Or this  
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equation simplifies to:  
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V x 0.78074896 = light through 4 panes of glass.  
 
BTW as a part of my work I regularly repair fiber optic cables. In 500  
meter cables (standard length) we see about 1/2 decibal of loss over the  
entire distance. And, most of the loss is because of refraction at the  
insertion & exit point. So, I think ur ''loss'' through the window is not  
loss through the glass, but refraction off the glass. So, you are losing  
light by reflecting it off the window & it never passing through.  
 
 
 
 
 
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Smooches , Thursday, 12th of August 2010 10:42:54 PM

If passing through one sheet involves a loss of 6%, then 4  
Smooches
sheets would cause a 24% loss. That means 76% will be transmitted.  
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Kiwi , Friday, 13th of August 2010 02:34:34 AM

It depends on many many factors. As you do not have the  
Kiwi
information nededed to take account of those factors all you can do is say  
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about 0.94^4 , roughly 78% ( but this is a really crummy question).  
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