We don't usually think in terms of a "volume of light." We tend to speak of brightness. But the amount of anything available in a given space is called a volume. "Please pass a quart of light" sounds ...

New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe's infancy—the earliest cosmic time yet accessible to humans. Measuring light ...

Forget hunting for a tape measure or a protractor. Use your Android phone camera and sensors to handle different types of measurements easily.

Ophir Optronics Inc. has introduced two new measurement heads. The PD300-BB radiometer head has a spectrally flat response from 400-1,000 nm. and is recommended when the power measurement of broadband ...

While conventional photodetectors can only measure light intensity, the light field contains much richer information. This information includes but is not limited to phase, polarization, and spectrum.