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Done by: Chua Wei Hern (9) 2O1

Wave Particle Duality. Done by: Chua Wei Hern (9) 2O1. What is the wave particle duality principle?. principle of  quantum physics  holds that matter and light exhibit the behaviors of both waves and particles, depending upon the circumstances of the experiment.

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Done by: Chua Wei Hern (9) 2O1

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  1. Wave Particle Duality Done by: Chua Wei Hern (9) 2O1

  2. What is the wave particle duality principle? • principle of quantum physics holds that matter and light exhibit the behaviors of both waves and particles, depending upon the circumstances of the experiment. • One of the most complex and confusing concept in physics

  3. Brief history • Aristotle was one of the first to publicly hypothesize about the nature of light, proposing that light is a disturbance in the element air.   • At the beginning of the 11th Century, the Arabic scientist Alhazen wrote the first comprehensive treatise on optics; describing refraction, reflection, and the operation of a pinhole lens via rays of light traveling from the point of emission to the eye. • Beginning in 1670 and progressing over three decades, Isaac Newton developed and championed his corpuscular hypothesis, arguing that the perfectly straight lines of reflection demonstrated light's particle nature; only particles could travel in such straight lines.

  4. PHOTOELECTRIC EFFECT • The photoelectric effect refers to the emission or ejection of electrons from the surface of generally a metal in response to incident light. • Energy contained within the incident light is absorbed by electrons within the metal, giving the electrons sufficient energy to be emitted from the surface of the metal. • The more intense the incident light, the greater the energy with which the electrons should be ejected from the metal. • One of the experiments for wave-particle duality of light • A way to prove light has particle properties.

  5. photons • An elementary particle • Basic unit of light • It is massless • Has no electric charge

  6. Sources • http://en.wikipedia.org/wiki/Photon • http://en.wikipedia.org/wiki/Wave%E2%80%93particle_duality#Brief_history_of_wave_and_particle_viewpoints • http://physics.about.com/od/lightoptics/a/waveparticle.htm • Books

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