Day: January 8, 2011

LASER

Spontaneous Emission

If the atom in the excited state automatically decays to the ground state by emitting a photon of energy (E2 – E1 = hυ), then

LASER

Stimulated Absorption in Laser

Stimulated Absorption is the starting point to achieve laser. It happens when a photon of light having energy E2 – E1 = hυ (as shown

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