Beginnings of electronics demo

August 27th, 2017

Maxwell distributions

November 11th, 2016

Maxwell distribution of velocities of the molecules has the form:

f(v)=(\frac{m_0}{2\pi kT})^\frac{3}{2}exp(-\frac{m_0 v^2)}{2 kT}) 4 \pi v^2 (1)

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Boltzmann distribution

November 10th, 2016

Let’s consider a gas that is in the gravity field (fig.1).


Fig. 1. Ideal gas in the gravity field.

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Rigid rotator

November 9th, 2016

Let’s consider the model of diatomic molecules in two material points m_1 and m_2, attached to the ends of weightless rigid rod (Fig. 1).

 Fig.1 Rigid rotator model

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Vibrational spectra of diatomic molecules

October 25th, 2016

Let’s perform the interpretation of the vibrational spectra of diatomic molecules  with use of quantum harmonic oscillator model (fig.1):


Fig.1. The harmonic oscillator: A – in a static state, B – in a position of a motion

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Heat engine. Entropy.

October 25th, 2016


Let’s construct a heat engine that converts heat into mechanical work. The heat engine consist of the next main elements: the working body (gas under the piston), heater, cooler (fig.1).


Fig. 1. The  main elements of the heat engine.

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Principle of action of AC generator

October 21st, 2016

Let’s consider the device shown in Fig.1


Fig.1. Schematic diagram of a simple AC generator: A -view profile, B – view from the front

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Band structure of optical semiconductors

October 18th, 2016

The training of specialists in the field fiber-optic communication lines involves the study of such difficult topics as “Light-emitting diode (LED)” and “Semiconductor Lasers” (Zvelto, 1990). Clarification of the physical foundations of these devices requires the use of educational information which is studied in the course of quantum chemistry. Read the rest of this entry »

Multimedia presentations

January 5th, 2012

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The equation of rectilinear uniform motion

January 5th, 2012

     Given that the trajectory of a material point (MP) motion is a straight line, the motion is called “a rectilinear motion”. The rectilinear motion can be described by the one-dimensional coordinate system. Let us suppose that at time 0 s MP was in the beginning of motion, at time t_0 s MP was at the point with coordinate x_0, and at time t MP was at the point with coordinate x.

Then the position of the MP at time t_0 is characterized by radius – vector \vec r_0 , MP position at time t is characterized by the radius – vector \vec r (Fig. 1).

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