how much light bounces off glass and how much goes through it?

Question

in regards to a very large picture hanging on my wall it faces sunlight and I've just begun to get concerned if it's going to get discolored by UV rays. So much light bounces off and how much is absorbed?or does it reflect an equel amount of light as everything else like metal and such?

Answer 1

if you are worried about the lighting and do not want to spend any money i would suggest moving it. there are windows that prevent uv rays from coming in. they are very expensive. each individual color in the picture will attract a different amount of uv rays and will also reflect it each respectively. darker colors absorb more and lighter colors reflect more thus giving off color. you can try to angle the picture so that the glass of the frame will bounce off the lighting. the windows from before have neon gas i think?

Answer 2

this can get extremely complicated.
simply put, the window glass will reflect and diffracta certain amount of uv. i asdsume you live in a house or an apartment and do not have a specialty glass.

if you hold a candle up to the window at night, the number of panes of glass will be the number of flame reflections you see.

if you live on the east coast you may have 3, on the west 2 at most, but for 90%of the housing out there, only 1 pane exists.

if you have multiple panes, the likelyhood of uv protection is much higher, but still not assured. if you live in a highrise, the glass there is almost guaranteed to have uv shielding.

for practical purposes, do not have a valued picture in strong sunlight, because, yes, much uv penetration will occur.

lotsa words 2 tell u u r right.

Answer 3

The amount of light that is reflected relative the the amount of light that is transmitted in glass, is a function of the type of glass, the thickness of the glass and the incident angle at which the light hits the glass. There is no real way to answer this question without more information.

It should be noted that light must be transmitted through the glass to make the picture visible, but only light in the visible spectrum is required.

You can purchase special glass that will exclude some damaging wave lengths of light.

Answer 4

Better move your picture because over a period of time the sunlight will make the colors fade.