When the moon is completely enveloped by the Earth's shadow, yet glows with a mysterious dark red light—this astronomical ...

Imagine when the sun, Earth, and moon align in a nearly straight line; the Earth blocks the direct sunlight, causing the moon to enter the Earth's umbra. At this moment, the moon does not completely ...

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 ...

Horiba has developed a particle size distribution measuring device that accurately measures particle size distribution even in the presence of similar-shaped particles. The device uses image ...

IN preparing an elementary lecture on Light, intended to be given at the Taunton College School, I have had to consider how best to explain the somewhat abstruse principle of optical refraction. It is ...

Rainbows are optical phenomena resulting from the interaction of sunlight, water droplets, and the human visual system, not physical objects. Scientific understanding of rainbows developed over ...