Physicists discovered light behaves like both a wave and a particle.

This dual nature of light, known as wave-particle duality, challenges traditional ways of understanding physics.

This concept emerged from experiments in the early 20th century, notably the famous double-slit experiment. In this experiment, light passed through two slits, creating an interference pattern characteristic of waves. However, when observed, light also behaved as discrete particles, known as photons.

Albert Einstein's work on the photoelectric effect further solidified the idea of particles of light. His findings earned him the Nobel Prize in Physics in 1921 and paved the way for quantum mechanics.

Wave-particle duality remains a fundamental principle in modern physics, highlighting the complex and fascinating nature of light and matter. It challenges our perceptions of reality and encourages us to explore the mysterious realm of quantum physics.