October 2009
Intermediate to advanced
503 pages
14h 28m
English
Content preview from Engineering PhysicsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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4.1 Waves and particles — de Broglie hypothesis — Matter waves
Classical theory of Newtonian mechanics successfully explains the motion of macroscopic particles, but fails to explain the motion of microscopic particles such as electrons. Whereas, the quantum theory successfully explains the motion of microscopic particles, interference, diffraction and polarization of electromagnetic waves, black body radiation (1901), photoelectric effect (1905), line spectra (1913) and Compton effect (1924), etc. Explanation of the above effects by quantum theory shows the dual nature of waves [wave nature and particle nature]. To explain some of the above facts, we consider packets of energy [photons] and waves. For example, in case of photoelectric effect ...
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