II. Spectral surface thermal emission and absorption of water

Conclusions

In the present paper we succeeded to complete the problem consideration and to obtain numerical results of the temperature dependence of refraction and absorption indices of water for the wavelengths from 2 to 80μ and temperatures from 0 to 75°C for every 5°C. Then these data were used in calculation of relative radiation factors and intensity of surface radiation of water for the ranges of wavelengths and temperatures considered above. The important result obtained is that a intensity of surface radiation of water within the most important short wavelength domain of the spectrum up to 11μ is completely due a refraction index of water, and not to an absorption index. Besides that, it was succeeded to find out that in the short wavelength range separately and in a separate domain of the long wavelength range of the spectrum water radiant as a black body. The wavelength boundaries in both short wavelength and long wavelength domains where this phenomenon is observed when temperature is changing from 0 to 75°C at the step of 5°C, are determined. A new pecularity of water related to its surface radiant depending of temperature is found. When water temperature is changing from 0 to −5°C absolute values: of surface intensity of radiation integral emissive factor and radiosity of water radiation have minima at temperatures of 30 to 35°C.

A new modification of the Stefan-Boltzman law is stated for grey bodies, where a degree in the index of temperature in the temperature dependence of radiosity of water is not equal to 4, as it is in the case of an absolutely black body, but is lesser, and this value is also depending on temperature. The numerical results of spectral intensity of radiometric quantity of water in wide range of wavelengths and temperatures, which are obtained in the present article, will be used in our next article in order to explain one most ancient “anomalous” physical property of water.