john mce's Articles in Science

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Optical Illusions; Are They of Scientific Value or Just Ephemeral Entertainment? We've all had some fun with optical illusions, staring blankly at pictures for 5 minutes until a rabbit turns into a duck, or a Jackson Pollack style painting slowly morphs into a forest scene, or more often than not nothing happens at all and you've been gazing dumbly at a set of squiggly lines and splodges for God knows how long. Science Fiction Vision, Laser Eye Surgery and Electronic Bifocals Heralded as a revolution by people who need glasses to read, laser eye surgery can eternally change your vision by reshaping the cornea. After a hinged flap is cut a portion of the cornea is revealed and exposed to laser pulses that vaporise the cornea and correct the shape permanently. Corrosion and Rust : Be Prepared Corrosion describes the breaking down of essential properties in a material due to chemical reactions with its surroundings. It is most commonly known in terms of metals which corrode when affected by moist air. This oxidates the metal and creates rust.

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