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 ...

Image Credit/Description: This image is of a full featured double rainbow in Wrangell-St. Elias National Park, Alaska, taken by Eric Rolph. After a particularly nasty storm (if you’re visiting ...

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 ...