July 12, 2010

You Tube clip: How skipping rocks relate to Polaroid sunglasses

by Stephanie

in Driving,Polarization

Have you seen the video clip on You Tube, How Skipping Rocks Relates to Polaroid Sunglasses  about how polarized lenses reflect glare? It uses the principle of skimming stones across a lake to explain a little about how light behaves.
 
It works like this. Light travels in all directions, but when it hits a horizontal surface like water or the road it becomes polarized into useful vertical light and horizontal light which we call glare. So put on your polarized sunglasses.
 
Now if you skim a stone across the lake in a horizontal motion, the stone will bounce off the water. The same applies to the light hitting the surface of the water with part of the light bouncing off as white blinding glare. This is blocked by polarized sunglasses.

But when you throw the stone in a vertical direction, it behaves differently and breaks through the water rather than skipping across the surface. This is what happens to the useful, non-glaring light going through the lens when you have a polarizing filter in your sunglasses, as all Polaroid polarized sunglasses do.

The specifically engineered polarizing filters block out horizontal light and only let through the useful vertical light. This eliminates the glare and improves your vision. Blocking glare improves safety, especially when driving as you’re not squinting into the sun.   
 
Take a look at the video, How Skipping Rocks Relates to Polaroid Sunglasses and then check out Polaroid’s polarized driving sunglasses collection to see which style will suit you.
 
 
 
 
 
 
 
 
 

 

 

 

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