Photon in a double-slit      "Photon in a double-slit" is an science experiment conducted by Thomas Young's in  1804 .  By conducting this experiment it was able to know that Photon (a particle representing a quantum of light or other electromagnetic radiation) shows properties of both waves as well as particles. Wikipedia.org Photon in a Double-Slit The "Photon in a double-slit" experiment is a famous scientific demonstration first conceptualized by Thomas Young in 1804, originally to explore the nature of light. While Young used sunlight and did not refer to photons (as the concept of photons was developed much later), his double-slit experiment laid the foundation for what would become one of the most important experiments in quantum mechanics. Thomas Young's The Original Experiment Thomas Young's experiment involved shining light through two narrow, closely spaced slits onto a screen. Instead of forming two bright spots behind the slits (as one mig...