Humans are quite good at assessing the properties of things just by looking at them, but we have discovered that we can do much much better with technology. Optical spectrometers study the absorption and emission of light, and are used in many different fields to analyze and identify the characteristics of a structure. Using optical spectrometers, we have been able to work out the molecular components of objects, from what molecules themselves are made of to the composition of distant nebulae. 

Researchers have now developed an ultra-compact spectrometer made of a single nanowire. This is an impressive breakthrough as scientists have been struggling to miniaturize these systems. Due to the physical constra

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