"Bright lights" newsreels and historical clips

... in dim lighting.

Bed and a bedside table with a lamp in the dim lighting.

Desk and book lying on it in dim lighting.

Bed and a bedside table with a lamp in dim lighting.

Desk and book lying on it in dim lighting.

General view of Lenin's bedroom in bright lighting.

Kind of bed in bright lighting.

Table ...

... Table and books in bright lighting.

Bed and a bedside table with a lamp in the dim lighting.

General view of the bedrooms in the dim lighting.

Table with lamp, chair and sofa in the dim lighting.

Bed and a bedside table with a lamp in the dim lighting.

Timiryazev's book "Science and Democracy" close-up in ...

... in the dim lighting.

Lenin's table with ink and calendar in dim lighting.

Bed and a bedside table with a lamp in the dim lighting.

Calendar, ink and books on the table close-up.

... in the carriage, the train arrives at the station.

Photos of Zander.

Computer animation: deployment of the "solar sail", rotation of the planet, bright light.

Rocket takeoff.

Pass through the woods, a ray of sunshine.

The bright light of the sun through the leaves.

Green leaves growing on a branch (multrabota).

Sprouts grow from the ground (multrabota).

Slow movement of the wings bees (Rapid).

Movement of cells under a microscope.

A photograph of a star cluster.

Etching: ...

... application of this camera - there is a light in the lamp, shots of a quantum of light, the bullet pierces right through the balloon.

Using high-speed cameras to determine the stability of structures.

Scientist looking into a microscope.

Growth of crystals in the light beam.

Blooming tulip bud (Rapid).

View ...

... corridor home for the elderly.

Close-up: hands folded on top of the deceased covered live hand.

A man goes to the darkened hallway, opened the door, a bright light.

Cemetery dug grave.

Wooden monuments under the snow on the graves.

Newsreel 1920 .: yy ground with shovels throw men and women (Rapid).

Wooden ...

A ray of light.

A model of a molecular crystal lattice.

The concept of linearity.

Refraction of light in a prism.

An experiment showing the law of light reflection.

The beam can be divided into parts, but in a homogeneous medium it always remains straight.

Air, water can lower its strength, but never ...

... never change color.

It was believed that light is not able to disrupt the harmonic vibrations in the molecules of matter, so its brightness varies proportionally.

Pendulums.

Photo by S.I. Vavilov.

In the mid-20s, he discovered an unusual behavior of light rays.

Experience with condensed spark.

The beam passing ...

... the source even more, he would have found that the dark glass becomes transparent, and the dependence curve steeply rushes up.

This meant that the bright light strongly rocked the molecular system, which means it changed the optical properties of the substance.

The pendulum.

Vavilov realized that the effect ...

... angle of reflection.

Experience.

The environment can change the color of the beam.

Red and green laser beams generate another beam - blue.

At high light power, the rays acquire the ability to self-focus, stretch into a thin thread.

A cartoon explaining the applied meaning of the laser.

With the help ...

... colleagues.

Khokhlov suggested the possibility of a smooth change in the frequency of lasers by methods of nonlinear optics.

The medium can change the light of the beam, and hence the frequency.

Experience: The laser emits an invisible infrared beam.

Put a crystal in its path and the beam becomes visible ...

... parametric light generator.

The palette of light frequencies becomes richer.

Molecular lattice on the background of piano strings.

Photo of the creators of the generator R.V. Khokhlov and S.A. Akhmanov.

Scientists for the development of the basics of nonlinear optics and parametric light generator were ...

The lightning discharge is a thousand times slower.

The light is reflected in a drop of water on a leaf.

Plants in the laboratory.

Nonlinear optics made it possible to create a laser with a short and powerful flash.

During the flash, the light manages to pass only a third of a millimeter.

Experience ...

... trench, there are pipes in it.

The welder welds the pipes.

Alternation of frames with welding works.

An electric arc is characterized by a dazzling bright light comparable to the brightness of the sun, temperatures of thousands of degrees, a high current density at a relatively low voltage.

To consider the ...

The electric arc is heterogeneous in its length.

A bright spot at the cathode and the same near the anode.

They are called cathode and anode active spots.

A cartoon explaining the nature of these spots.

The formula of the total voltage drop in the arc.

The resistance of a gas or steam depends on the ...

... lower and upper flame.

A sheet of thick paper is lowered onto the flame.

A burning candle is covered with a glass cap.

The candle goes out.

The lit splinter is lowered into a vessel with nitrogen, and then into a vessel with oxygen.

A piece of burning wood on a wire is lowered into oxygen.

The ...

... the tube.

The tube is placed in the bright part of the candle - black smoke comes from the other end.

The burning wick of the spirit lamp.

Iron filings are poured on the flame of the spirit lamp.

A piece of lime is placed in the flame of hydrogen, it becomes bright.

In a glass cup, mix lime with water ...

... Volnova, a researcher at the ICI RAS.

Astrophysical Observatory "Spectrum-RG" and the constellation of Veronica's Hair, detailed X-ray images.

The bright comet evaporated under the Sun.

One line:

- The South Korean satellite "CAS-501" has been delivered to Baikonur;

- In China, they choose the name ...

... of the head of the MCC Maxim Matyushin to the magazine "Russian Cosmos".

Astrophoto of the week: the Simeiz-147 nebula ("Spaghetti"), the northern lights over the Maly Vudyavr Lake in Khibiny, the Milky Ring.

The question about space: is it possible to tan in space?

Egypt: Joint US-Egyptian maneuvers "Bright Star-85".