Scientists have demonstrated how to manipulate light by using time-varying media in the form of specialized nanomaterials.

A unique feature has just occurred a couple of days before the spring equinox. We have the details on the extra daylight ...

Periods of rain alternated with sunshine in Santa Cruz Monday to provide optimal conditions for rainbows, and multiple ...

For the first time, scientists have demonstrated that negative refraction can be achieved using atomic arrays—without the need for artificially manufactured metamaterials. Scientists have long ...

Destiny 2’s one of a kind Exotic introduced in The Final Shape will go beyond broken in Heresy Act 2 thanks to new Artifact Perks.

Light changes speed as it passes from one medium to another. This is called refraction. The frequency of light does not change as it refracts. The refractive index of a material is a measure of ...

When suitably cut and mounted between glass cover-slips, naphthalene crystals exhibit the phenomena of conical refraction in a very striking way, and enable their features to be critically examined.

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 ...

In addition to the objective refraction, the keratometer values and the pachymetry can be determined with precision in a matter of seconds with the PARK 1 ®. The integrated patient data ...

As St. Patrick’s Day approaches, images of leprechauns, shamrocks, and, of course, rainbows leading to pots of gold flood our imaginations. But while the legend of treasure waiting at the end of ...