The first law of refraction states that the incident rays, refracted rays, and the normal to the interface at the point of incidence, all lie in the same plane. The ratio of the sine of the angle of ...

In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum. Today we ...

There has been light from the beginning. There will be light, feebly, at the end. In all its forms—visible and invisible—it saturates the universe. Light is more than a little bit inscrutable. Modern ...

An invisible band of radiation with wavelengths from 400 to 10 nm, ultraviolet (UV) light starts at the end of visible light and ends at the beginning of X-rays. The primary source of ultraviolet ...

It’s funny. I expected today to be a really light day in the world of sports. It’s kind of an in-between day, actually, in-between the weekend’s college hoop action. But after doing my usual spin ...

Most are familiar with Coors Light, Miller Lite, Bud Light, Natural Light and Keystone Light. But now craft brewers are tackling the definition of light beer and creating new brews that are not only ...