Suppose NASA sent a robotic craft to explore the deep oceans of Jupiter’s moon, Europa (assume the ocean water has an index of refraction 1.34) . In an attempt to be discrete, NASA applies a coating to the submarine-like craft, to make it indetectable to any creatures in the ocean who can see light with a wavelength of 1200nm. The coating material has an index of refraction of 1.25. a) Draw a clear physics diagram of the problem. b) Technology only allows for coatings to be 1 micrometer or thicker. What is the thinnest coating that can be applied to the craft to make it invisible

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The Space Lattice and Unit Cells

Every matter consists of atoms, molecules, and ions. If these atoms, molecules, and ions (micro-particles) are represented in a three-dimensional space-occupying certain specific points in space, then these arrangements are termed as space lattices and the specific points which are being occupied by atoms, molecules and ions are termed as lattice points. The atoms, molecules, and ions at the lattice points are generally grouped in a regular fashion and repeat periodically at the three-dimensional space.