## Electromagnet An electromagnet is a coil with a ferromagnetic core inserted into it. The magnetic field of a current-carrying coil is of particular practical interest. If a coil with current is suspended on thin and flexible wires, it will align itself just like a compass needle: one end will point north, and the other end will …

## Dispersion of light Dispersion of light (light breakdown; light scattering) is the phenomenon of breaking down light into a spectrum due to the dependence of the refractive index of a medium on the frequency of the light wave. light scattering is the phenomenon of breaking down white light into its component colors. The reason for this breakdown is …

## Titanium Titanium (chemical symbol – Ti, from Latin Titanium) is a chemical element of the 14th group (formerly classified as a subgroup of the fourth group, IVB) of the fourth period of the periodic table of chemical elements by D. I. Mendeleev, with an atomic number of 22. Group of metals: Refractory lightweight metal Atomic number: …

## Varistor A varistor is a semiconductor resistor with a symmetric non-linear volt-ampere characteristic. The name is derived from the words “variable resistor” – a resistor that changes. It has the property of sharply decreasing its resistance when the applied voltage exceeds a certain threshold value. With further increase in voltage, the resistance decreases even more. Principle …

## Diffraction of light Diffraction of light is the bending of light waves around the edges of opaque objects and the penetration of light into the region of geometric shadow. Diffraction of light is a characteristic of all waves and is observed in cases where: The condition for observing diffraction is given by: r ≥ d2 / λ Where: …

## Ohm’s Law Ohm’s Law This law takes into account the key quantitative characteristics of an electric circuit: Ohm’s Law А law stating that electric current is proportional to voltage and inversely proportional to resistance. To describe an electric circuit that does not contain EMF, you can use Ohm’s law for a section of the circuit. This is …

## Light Light is electromagnetic radiation that is perceived by the human eye. The human eye detects electromagnetic waves with wavelengths ranging from 380 to 760 nanometers (nm). The short-wavelength boundary is typically considered to be the range of 380-400 nm (790-750 THz), while the long-wavelength boundary is 760-780 nm (up to 810 nm) (395-385 THz). Red …