中国物理B ›› 2017, Vol. 26 ›› Issue (4): 40301-040301.doi: 10.1088/1674-1056/26/4/040301

• GENERAL • 上一篇    下一篇

Physical interpretation of Planck's constant based on the Maxwell theory

Donald C Chang(张东才)   

  1. Macro-Science Group, Division of LIFS, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
  • 收稿日期:2016-11-21 修回日期:2017-01-05 出版日期:2017-04-05 发布日期:2017-04-05
  • 通讯作者: Donald C Chang E-mail:bochang@ust.hk
  • 基金资助:

    Project partially supported by the Research Grant Council of Hong Kong, China (Grant No. RGC 660207) and the Macro-Science Program, Hong Kong University of Science and Technology, China (Grant No. DCC 00/01.SC01).

Physical interpretation of Planck's constant based on the Maxwell theory

Donald C Chang(张东才)   

  1. Macro-Science Group, Division of LIFS, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
  • Received:2016-11-21 Revised:2017-01-05 Online:2017-04-05 Published:2017-04-05
  • Contact: Donald C Chang E-mail:bochang@ust.hk
  • Supported by:

    Project partially supported by the Research Grant Council of Hong Kong, China (Grant No. RGC 660207) and the Macro-Science Program, Hong Kong University of Science and Technology, China (Grant No. DCC 00/01.SC01).

摘要:

The discovery of the Planck relation is generally regarded as the starting point of quantum physics. Planck's constant h is now regarded as one of the most important universal constants. The physical nature of h, however, has not been well understood. It was originally suggested as a fitting constant to explain the black-body radiation. Although Planck had proposed a theoretical justification of h, he was never satisfied with that. To solve this outstanding problem, we use the Maxwell theory to directly calculate the energy and momentum of a radiation wave packet. We find that the energy of the wave packet is indeed proportional to its oscillation frequency. This allows us to derive the value of Planck's constant. Furthermore, we show that the emission and transmission of a photon follows the all-or-none principle. The “strength” of the wave packet can be characterized by ζ, which represents the integrated strength of the vector potential along a transverse axis. We reason that ζ should have a fixed cut-off value for all photons. Our results suggest that a wave packet can behave like a particle. This offers a simple explanation to the recent satellite observations that the cosmic microwave background follows closely the black-body radiation as predicted by Planck's law.

关键词: Planck', s constant, Maxwell', s theory, de Broglie relation, uncertainty principle, wave packet, photon

Abstract:

The discovery of the Planck relation is generally regarded as the starting point of quantum physics. Planck's constant h is now regarded as one of the most important universal constants. The physical nature of h, however, has not been well understood. It was originally suggested as a fitting constant to explain the black-body radiation. Although Planck had proposed a theoretical justification of h, he was never satisfied with that. To solve this outstanding problem, we use the Maxwell theory to directly calculate the energy and momentum of a radiation wave packet. We find that the energy of the wave packet is indeed proportional to its oscillation frequency. This allows us to derive the value of Planck's constant. Furthermore, we show that the emission and transmission of a photon follows the all-or-none principle. The “strength” of the wave packet can be characterized by ζ, which represents the integrated strength of the vector potential along a transverse axis. We reason that ζ should have a fixed cut-off value for all photons. Our results suggest that a wave packet can behave like a particle. This offers a simple explanation to the recent satellite observations that the cosmic microwave background follows closely the black-body radiation as predicted by Planck's law.

Key words: Planck', s constant, Maxwell', s theory, de Broglie relation, uncertainty principle, wave packet, photon

中图分类号:  (Classical electromagnetism, Maxwell equations)

  • 03.50.De
03.65.-w (Quantum mechanics) 03.65.Ta (Foundations of quantum mechanics; measurement theory)