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I was thinking about how does the 3D glasses(not the one with red and blue lens) work. My first idea is that the lenses are polaroids with orthogonal polarization. So I got a 3D glasses from a cinema and try to prove it.
I wear the glasses properly(with the arms on my ears) and then look at my LCD monitor. if I rotate my head to about 45 degree, the whole scene becomes bluest. If I rotate 45 degree to the opposite direction, the whole scene becomes yellowest. The same for both eyes.
I also get the same result when I look at a rainbow, which should be polarized.
I do the experiment with LCD monitor again, but I am not wearing the glasses properly this time. I look through the lenses in the reverse direction(with the arms pointing to the screen) and the result is different. For 45 degree anti-clockwise rotation, nearly no light can pass, and for 45 degree clockwise rotation, the brightest image can be seen. The same for both lenses again.
If my idea is right, here is my question:
1. If I wear the glasses properly, I expect the image will be dimmer and brighter as I rotate, but why is it isn't the case and resulting in the change of color?
2. Why isn't the result be the same when I look from different side of the lenses?
3. The images are the same when I look through the left lens and the right lens, that means they have the same polarization, so how could we perceive a 3D image?
I wear the glasses properly(with the arms on my ears) and then look at my LCD monitor. if I rotate my head to about 45 degree, the whole scene becomes bluest. If I rotate 45 degree to the opposite direction, the whole scene becomes yellowest. The same for both eyes.
I also get the same result when I look at a rainbow, which should be polarized.
I do the experiment with LCD monitor again, but I am not wearing the glasses properly this time. I look through the lenses in the reverse direction(with the arms pointing to the screen) and the result is different. For 45 degree anti-clockwise rotation, nearly no light can pass, and for 45 degree clockwise rotation, the brightest image can be seen. The same for both lenses again.
If my idea is right, here is my question:
1. If I wear the glasses properly, I expect the image will be dimmer and brighter as I rotate, but why is it isn't the case and resulting in the change of color?
2. Why isn't the result be the same when I look from different side of the lenses?
3. The images are the same when I look through the left lens and the right lens, that means they have the same polarization, so how could we perceive a 3D image?