Dive into the revolutionary science of nitride semiconductor blue lasers and advanced LED technology. This authoritative guide illuminates the fundamental physics, device principles, and practical applications of modern light emitting diodes and laser diodes. Essential for graduate students and researchers in India pursuing studies in optoelectronics, physics, and photonics, it meticulously covers theory, experiment, and the breakthroughs that redefined solid-state lighting. Equip yourself with knowledge of efficient, long-lasting light sources shaping the future of illumination and data.