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Terahertz (THz) radiation, a slice of the electromagnetic spectrum that occupies the middle ground between microwaves and infrared light, is rapidly finding important uses in medical diagnostics, security, and scientific research.
Word of the Day
- In costermongers' slang, a cheap red-skinned apple, which is rubbed hard with a cloth to give it the appearance and feeling of an apple of superior quality.
The origin of the word 'gawf' is obscure, but may come from the phrase 'go for more'.