Currency: for every action, there is an equal and opposite reaction

Sir Isaac Newton is one the most celebrated scientists of all time. Probably his two most significant contributions were; firstly, the theory of colour, in which he observed the refraction of light through a prism separating the light into its constituent spectral colours; secondly, is of course, his laws of motion (and by extension the essence of gravity), which together provide the foundation for modern day physics.

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