Hirn, T., Kirmas, A., Backes, D., & Eckstein, L. (2021). The influence of radiation intensity and wavelength on thermal perception. Building and Environment, 196, 107763.
Added by: Sarina 2025-05-24 08:25:03
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Fig. 1 illustrates that human skin reflects between 30% and 70% of incident short-wave radiation (IR-A radiation with 𝜆 = 0.78 μm to 1.4 μm, and also visible light). In contrast, for long-wave radiation (IR-C type with 𝜆 ≥ 3 μm) the skin’s reflectance is typically below 10% [11– 14]. Similar observations were made for typical cotton clothing, which hardly absorbs and rather reflects short-wave radiation [15]. As for instance sunlight largely consist of short-wave radiation, the practical significance of these considerations becomes clear.