The Theory that Light has particles…

On December 4, 1900, Max Karl Ernst Ludwig Planck theorized that light radiates not as waves (as Isaac Newton claimed), but that light was made of particles or packets called quanta. Energy of each quantum determined by frequency times the value of constant (h). h, now called Planck constant is in meter-killogram-second units and has a value of 6.6260755 x 10 power of 34 joule-second.

Planck’s work is the base for which Quantum Physics is based, and for that in 1918 he won the Nobel Prize in Physics.

      December 4th 1900
      Max Karl Ernst Ludwig Planck

Additional Information:

  • Wave–particle duality – Wikipedia
    Wave–particle duality is the concept that every elementary particle or quantic entity may be partly described in terms not only of particles, but also of waves. It expresses the inability of the classical concepts “particle” or “wave” to fully describe the behavior of quantum-scale objects.
  • Light is It a Wave or a Particle? – Canon
    Around 1700, Newton concluded that light was a group of particles (corpuscular theory). Around the same time, there were other scholars who thought that light might instead be a wave (wave theory).
  • Corpuscular theory of light – Wikipedia
    In optics, the corpuscular theory of light, arguably set forward by Pierre Gassendi[when?] and Thomas Hobbes,[citation needed] states that light is made up of small discrete particles called “corpuscles” (little particles) which travel in a straight line with a finite velocity and possess impetus.
  • Newton’s theory of Light – The Star Garden
    English natural philosopher Isaac Newton bought his first prism in 1666, in an attempt to disprove French natural philosopher Rene Descartes’ theory of light. This was one year after Italian natural philosopher Francesco Grimaldi’s work on diffraction was published.

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