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The wings of tiger beetles (the figure below) are colored by interference due to

ID: 1361606 • Letter: T

Question

The wings of tiger beetles (the figure below) are colored by interference due to thin cuticle-like layers. In addition, these layers are arranged in patches that are 45 m across and produce different colors. The color you see is a pointillistic mixture of thin-film interference colors that varies with perspective. Approximately what viewing distance from a wing puts you at the limit of resolving the different colored patches according to Rayleigh's criterion? Use 500 nm as the wavelength of light and 3.0 mm as the diameter of your pupil.

Explanation / Answer

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