Oscillation - Motion of body to and forth and back to forth, population inversion - Number of active atoms in higher energy state, Electron - Particles which revolves around the nucleus, interfernce - superposition of two or more waves, ultrasonic - waves having freqeuncy above audible range, monochromatic - light having single wavelength, unit cell - smmallest and repating arrngment in crstal structre, X Rays - Electromagnetic wave having short wavelength,

Engineering Physics

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