BISMARCK, N.D. (KFYR) - To create atmospheric optics we need two things: ice crystals in the air and a light source. All ...

It is refraction that makes some objects appear to bend when they are viewed through water, like the straw shown here. If the light hits the surface of a glass block at an angle, this change in ...

The Nigeria Optometrist Association, NOA, have identified uncorrected refraction error as one of the most common eye ...

THERE is a point in connection with the ordinary expositions of Fresnel's theory of double refraction to which, on account of its frequent occurrence, it is perhaps worth while to direct attention.

The beam should bend back down. The physics is that of an upside-down mirage. In the tank, from top to bottom, the index of refraction is increasing, as in a mirage from the ground up. Shine the laser ...