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1. What is the distance between the nearest Ga atoms in a GaAscrystal.
2. The de Broglie wavelength of a particle λ=h/mvdescribes the wave-particle duality for small particles such aselectrons. What is the de Broglie wavelength of an electron at150eV? what is the wavelength for electrons at 10keV, which istypical of electron microscopes? Comparing this to visiblel light,comment on the advantages of electron microscopes.

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