This work proposes an example of experimental approach for the treatment of statistic matters for last classes of the secondary school. Through the construction of Galton’s machine, the validity of the central limit theorem has been shown and as the distribution of the random experimental data is described to the best by the Gauss’curve. […]
The original X-ray diffraction pattern of DNA obtained in 1953 by Franklin e Gosling is discussed and explained. An experiment that shows how a similar image can be obtained with a combination of diffraction gratings is proposed. […]
We present an experiment to measure the temperature dependence of magnetic susceptibility of a dia-magnetic material such as pyrolityc graphite. Pyrolityc graphite is a typical diamagnetic material and can levitate in a strong magnetic field. the levitation height was changed by varying the pyrolityc graphite temperature using a lighter. […]
This research intended to analyse Einstein’s paper on granular structure of radiation, more by the light of Einstein’s later writings. The following topics will be discussed the reasons for his quantum theory’s formulation and the connection between Planck’s radiation theory and Einstein’s ideas. […]