THE lantern, or light organ, of a particular Photuris firefly is covered with jagged scales that dramatically enhance the brightness of the light that the insect produces. *
Consider: Researchers
have found that tiny scales on the lantern surface of some fireflies
form a corrugated pattern, somewhat like overlapping shingles or tiles.
The scales tilt up at one end by just 3 micrometers —less than one
twentieth the thickness of a human hair. Yet this tiny tilt lets the
lantern shine almost 50 percent more brightly than it would if the
scales formed an even surface!
Could
that concept improve the efficiency of light-emitting diodes (LEDs),
which are used in electronic devices? To find out, scientists coated
LEDs with a corrugated surface similar to that of the firefly’s lantern.
The result? The LEDs emitted up to 55 percent more light! Physicist
Annick Bay says: “The most important aspect of this work is that it
shows how much we can learn by carefully observing nature.”