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Gold Beetle Research Paper

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The nature of light has been the subject of contentious scientific scrutiny for most of recorded scientific history. At the heart of that scrutiny was a debate over the fundamental properties of light: is light a wave or a particle? Ancient scientists like Euclid of Alexandria and Ptolemy of Rome conducted rudimentary experiments exploring the tendency of light to reflect off of smooth surfaces or refract when passing through a medium. These were the first indications of light’s wave properties. Ultimately, this wave theory of light was insufficient in explaining all of light’s phenomena; for example, when light encounters a corner, it will cast a shadow rather than bend around the corner like waves of sound--thus the debate continued. The work of an Italian physicist, Francessco …show more content…

The Gold Beetle has a multi-layered exoskeleton that will allow for interference patterns to create the beetle’s golden appearance. When light strikes the beetle, each layer of its exoskeleton refracts light differently. When the wavelengths of the refracted light are in phase, this additive interference causes the total refracted light to be amplified, allowing the beetle to appear metallic. The beetle also has a secondary mechanism if its highly reflective camouflage fails to protect it. The beetle can pump an orange-pigmented fluid underneath its wing covers which alters the spacing of the layers of the exoskeleton. The change in spacing of the exoskeleton removes the effects of the additive interference, allowing the beetle to mimic another species, the Ladybird Beetle (Hippodamia convergens). While the Gold Beetle is harmless, the Ladybird Beetle is highly toxic and bad-tasting to predators. This example of Batesian mimicry effectively discourages dangerous predators from feeding on the now toxic-appearing Gold

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