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If a television is positioned so that it is badly seen owing to light reflected from its surface, it can often be seen clearly through a polaroid filter. Why is this???

2007-03-27 02:21:26 · 4 answers · asked by acourting 1 in Science & Mathematics Physics

4 answers

This is because the polaroid cuts out the glaring portion of the light hence you only see the part which does not create glare .This technique is also used in automotive headlights to cut the glare

2007-03-27 02:32:41 · answer #1 · answered by deepak 1 · 0 0

Light reflected from a glass surface tends to be plane-polarized. A suitably oriented Polaroid filter will block this reflected light but transmit the light produced by the TV display.

2007-03-27 02:33:13 · answer #2 · answered by lunchtime_browser 7 · 0 0

The way I get it is that polaroid filters are little tiny lines that stop light from entering from all wonky angles, so it takes all that willy-nilly light and bounces it away, saying "Get outta my face with all that nonsense glare," then all you're left with is the light coming from the object, not all the light bouncing off of it. I mean you still get a bit of glare on stuff, but it filters out most other stuff.

It's like a jailcell, oldschool movie ones, you see the light shining on the prisoner, it shines and shows the bars, polaroid filters are like that as I recall. the light can only come in through one direction(the door with the bars). This is compared to the same individual outdoors, with light coming from every angle on a bright day, because light bounces off of things.

2007-03-27 02:57:50 · answer #3 · answered by Luis 6 · 0 0

Most probably because you have an LCD screen which emits polarised light. Another polariser won't dim the screen much but it will remove at least half of the reflected light.

2007-03-27 02:27:08 · answer #4 · answered by Anonymous · 0 0

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