Multiple choice general knowledge

The iridescence of pearls depends on the number and thickness of the nacre layers. Which of these combinations provides the most iridescent pearl?

  1. Fewer layers that are very thin

  2. Many layers that are as thick as possible

  3. A small number of layers that are very thick

  4. A large number of layers that are as thin as possible
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The most iridescent pearls have a large number of very thin nacre layers. Thin layers create more uniform and intense light interference patterns, producing better orient (iridescence). Thick layers or fewer layers don't create the same optical effect. The quality of pearl iridescence (orient) depends precisely on layer thickness - thinner and more numerous means better light diffraction and more vibrant colors.

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