How did the work of Niels Bohr lead to the development of quantum theory?

Niels Bohr, a Danish physicist, made significant contributions to the development of quantum theory by introducing new quantum principles that revolutionized our understanding of atomic behavior and subatomic particles. One of Bohr's most notable achievements was the development of the Bohr model of the atom, which proposed that electrons orbit around the nucleus in discrete energy levels rather than in a continuous manner.

Bohr's model laid the groundwork for the concept of quantized energy levels in atoms, which was a crucial step towards the establishment of quantum mechanics. His work also contributed to the understanding of wave-particle duality, where particles exhibit both wave-like and particle-like behavior simultaneously.

By combining classical physics with newly emerging quantum concepts, Bohr played a pivotal role in the quantum revolution of the early 20th century. His innovative approach to atomic physics paved the way for the development of quantum theory, which has since become a fundamental framework for explaining the behavior of matter at both the atomic and subatomic levels.