Explain how a laser works using 3-level and 4-level energy level diagrams. Make sure to explain stimulated emission, pumping, population inversion, and how light amplification occurs. Give examples for each type of laser: solid state, gas, dye, and semiconductor listing the wavelength of light emitted.

Explain how a laser works using 3-level and 4-level energy level diagrams. Make sure to explain stimulated emission, pumping, population inversion, and how light amplification occurs. Give examples for each type of laser: solid state, gas, dye, and semiconductor listing the wavelength of light emitted.