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Heather33 | 15:39 Sat 16th Dec 2006 | Quizzes & Puzzles
3 Answers
a source of light especially one that cab be used to measure colour temperature
i?luti?a?t
glass with a high refractive index and a low abbe number between 50 and 55 that is manufactured for use in instruments
optic ?l?l???
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illuminant
optical flint
33d Sebum (not 'sweat'!)
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thanks johnalex

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