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accidental color

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accidental color

accidental color
accidental color, a false or spurious color seen in some instances, owing to the persistence of the luminous impression upon the retina, and a gradual change of its character, as where a wheel perfectly white, and with a circumference regularly subdivided, is made to revolve rapidly over a dark object, the teeth of the wheel appear to the eye of different shades of color varying with the rapidity of rotation. see accidental colors, under accidental...
see also color



Global Glossary English Portuguese

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accidental color
[física] s. cor acidental, f.

Geology Terms

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accidental color
צבע לוואי -
צבע של מינרל שמקורו בזיהום בצובענים זרים. צבע לוואי אדום, למשל, נגרם על-ידי זיהום של תחמוצות ברזל (כעין חלודה). יש גם צבעי העלאה, שהם קשת של צבעים הנראים לעתים במינרלים מתכתיים.



| accidental color in Portuguese