Day: May 29, 2020

Polarized Sunglasses – Who Invented Them?

Polarized sunglasses, like many great inventions, are used by many of us without a second thought. But did you ever stop to think about where polarized sunglasses come from? Somebody had to come up with them.

Actually, we owe the creation of polarized sunglasses to four men. In the 1750s, James Ayscough experimented with using tinted glass to correct vision problems.

Many scientists of the time were studying the properties of light and color. In 1808, Etienne-Louis Malus, a French physicist and mathematician, he discovered that light waves from the sun, which usually vibrate in all directions, can be aligned into one direction when it is reflected off something, like water. According to Malus’ law, the intensity of light transmitted through a polarizing filter depends on the angle of the filter in relation to the light.

While Malus’ law is important in the study of optics, it remained for Scottish … Read More