Laser Physics: Quantum Controversy in Action

Laser physics is a subject whose roots go back to the very source of quantum thought, namely, blackbody radiation and the Planck distribution. But the road to the first maser device showing radiation amplification by stimulated emission was rocky indeed. Likewise, the struggle to produce the first laser was hampered by much false “wisdom.” Furthermore, the understanding of the laser, its extraordinary radiation, and its limits of operation is a great example of how our understanding of quantum physics has developed through and is illuminated by vigorous argument and debate, which extends even unto today.