Where the light has travelled through an undistorted drop supernumeraries can sometimes be seen.
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In focus view of light refracted through a drop.
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Out of focus showing the extra arcs.
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The refracted and reflected light source at the top of the lower drop.
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More arcs are visible than in a rainbow because it is coming from a single drop.
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Positioning is critical, moving just a few millimetres can pick up more or less distorted paths.
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This affects the number of bands visible.
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