NATURAL mirage is due to the passage of rays of light through strata of air in which the refractive index is a function of the height of the ray above the ground. In these strata the air, though not ...

A property of a material that changes the speed of light, computed as the ratio of the speed of light in a vacuum to the speed of light through the material. When light travels at an angle between two ...

Among the various sensing modalities available for bioprocess operations, index of refraction (IoR) is intriguing for its simplicity and capability for sample-less, real-time readout. A group led by ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

The Brix scale, derived from the refractive index of a solution at 20 degrees Celsius (68 Fahrenheit), is widely known. Originally, it was established by determining the weight percentage of sucrose ...

In the middle of summer, on an asphalt road heated by the sun, it's common to spot what looks like a patch of water in the distance. Drivers and cyclists experience this: it appears as a shiny puddle ...