The Science Behind Flares, Lanterns, and Reflectors

What are flares, lanterns, and reflectors?

Answer:

Flares are intense bursts of light or heat resulting from the interaction of opposing magnetic fields. Lanterns are steady sources of light often used for illumination. Reflectors, particularly 'corner reflectors', return light back to its source; they are used in various applications, including measuring the Moon's orbital distance and enhancing safety on bicycles and cars.

Explanation:

Flares, in a scientific context, often refer to sudden flashes of light or heat that occur when magnetic fields pointing in opposite directions release energy by interacting and destroying each other—similar to a stretched rubber band releasing energy when it breaks.

Lanterns are light-emitting devices often used for illumination in various contexts. They provide a steady source of light in contrast to the temporary burst of a flare.

Reflectors, specifically 'corner reflectors', are objects consisting of two mutually perpendicular reflecting surfaces. They are designed to return light in the direction from which it originates. For example, astronauts placed a corner reflector on the Moon to measure its gradually increasing orbital distance. Many inexpensive reflector buttons on bicycles, cars, and warning signs use this technology, as do binoculars and periscopes.