This work intends to show a new estimation method for the Planck constant using Light-emitting diodes (LED's) as spectrally selective detectors that measure the light emitted by low power lamp. The spectral bandpass of Light-emitting diodes is typically 25 - 35 nm at half-maximun points between 550 and 700 nm, this means that LED's can serve as accurate selective sensor at physics laboratory. Likewise is done a similar approach for estimated the Stefan-Boltzmann law. This permit discuss the energy distribution of black-body in a physics course.
led; constante de Planck; Lei de Stefan-Boltzmann; corpo negro
