In this problem, we study a porous membrane with cylindrical pores. The diameter of pores is less than 50 nm. Since it’s much smaller than the wavelength of light, the medium is transparent, but the refractive index depends on the polarization and direction of light propagation. More information about the samples studied is in the …
This kit is for beginners in physical experiments and reveals basic concepts such as working with measuring instruments, calibration, and plotting graphs.
In this problem of the Final of RusPhO-2020, we need to measure the parameters of the cavity hidden inside the transparent disk. You can see the inscription “Final RusPhO 2020” on the box: the problem was originally developed for the 2020 olympiad, which did not take place due to the COVID pandemic. Оптический серый ящик …
This optical black box contains a mirror and a lens. We need to measure the lens focal length and determine how the mirror is positioned.
In this experiment, we observe diffraction on an optical (magnified) model of DNA. We calculate the parameters of the DNA structure using the diffraction pattern. Rosalind Franklin’s cross-shaped X-ray pattern led to the development of a model of the DNA structure. This X-ray pattern was shown in Watson and Crick’s 1962 Nobel Prize-winning paper. https://en.wikipedia.org/wiki/Photo_51
Photonic crystals are materials with periodic variation of refractive index on a scale comparable to the wavelength of light. In this experimental problem, we study the properties of photonic crystals based on porous films of anodic aluminum oxide (AAO). The structure of AAO porous films is a system of disjoint cylindrical channels with a diameter less than …
The 10-turn potentiometer is inside the black box featuring two outputs. We measure the resistance as a function of the handle angle of rotation and determine the wiring diagram.
In this problem, you need to determine the power of a light emitted by a bulb. To do so, we measure the temperature of the black body heated by the lamp.
A set of four experiments with increasing difficulty, in which we should measure and interpret I-V curves. https://www.youtube.com/watch?v=mAWgILhu7EEhttps://www.youtube.com/watch?v=l9tY7N5Id14
In this experimental problem, we investigate the electric motor using a frequency meter.