Planck’s relation – Knowledge and References

Planck's relation

Planck relation refers to the mathematical relationship between the energy of a photon and its associated wavelength, which states that the energy of a photon is inversely proportional to its wavelength. This relationship is derived from the Einstein-Planck relation, which relates the energy per photon to the characteristic frequency of the photon's oscillations, and involves the Planck constant.From: Quantitative Bioimaging [2020], Introduction to Physics in Modern Medicine [2020]

Quantum Theory, Energy Bands of Solids, Effective Mass, and Holes

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Published in Jyoti Prasad Banerjee, Suranjana Banerjee, Physics of Semiconductors and Nanostructures, 2019

Jyoti Prasad Banerjee, Suranjana Banerjee

where E=ℏω=hυ (Planck relation).

Highly polarised electroluminescence in low aspect ratio mesogenic molecules

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Journal Information

Published in Liquid Crystals, 2019

Sa-Wook Kim, Dong-Myoung Lee, Jae-Hoon Kim, E-Joon Choi, Chang-Jae Yu

The UV absorption and the PL properties of two compounds have been observed. The absorption and the PL spectra of two compounds in CHCl3 solvent are shown in Figure 3. The wavelengths of the maximum absorption, the onset absorption, and the wavelengths of the maximum PL of each compound were summarised in Table 2. Although two compounds have different lengths of the flexible end group, both compounds exhibited the same absorption spectra with the maximum absorption at 345 nm and the onset absorption at 380 nm since they have the same rigid core groups. The optical band gap (Egopt) was determined by measuring the onset value of the absorption spectrum, and was calculated to be 3.26 eV using the Planck relation. The PL external quantum efficiency of compound 2 was a little greater than that of compound 1 without thermal treatment.

Planck's relation

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Quantum Theory, Energy Bands of Solids, Effective Mass, and Holes

Highly polarised electroluminescence in low aspect ratio mesogenic molecules