@article{xavier jr._celaschi_2012,  title={Black body radiation as a function of frequency and wavelength: an experimentally oriented approach},  volume={34},  ISSN={1806-1117},  url={https://doi.org/10.1590/S1806-11172012000200007},  DOI={10.1590/S1806-11172012000200007},  number={2},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Xavier Jr., Ademir L. and Celaschi, Sergio},  year={2012},  month={Apr},  pages={2304} }