INBDE (Integrated National Board Dental Examination) Practice Exam

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In terms of opalescence, it appears _____ in reflected light and _____ in transmitted light.

  1. Blue, Red-orange

  2. Red-orange, Blue

  3. Yellow, Green

  4. Green, Yellow

The correct answer is: Blue, Red-orange

In terms of opalescence, certain materials exhibit a phenomenon where they appear blue in reflected light and red-orange in transmitted light. This unique optical effect is due to the scattering of light within the material, causing different wavelengths to be reflected and transmitted in various directions. As a result, the material may appear differently depending on whether the observer is viewing it in reflected light or transmitted light. Option A correctly describes this characteristic of opalescent materials, making it the most appropriate answer. Options C and D do not accurately represent the typical color appearance associated with opalescence, while option B reverses the color characteristics seen with opalescent materials.

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