Niji cube

Here the iridescent spectrum is not created by refraction, as with a prism, but by diffraction, where light waves deconstructively and structurally interfere.

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The law of conservation of energy

A classic illustration of the principle is a spring or mathematical pendulum with negligibly small damping.

In the case of a spring pendulum, the potential energy of the deformed spring is converted into kinetic energy of the weight and back as it oscillates.

Likewise in the case of a mathematical pendulum, the potential energy of a weight in a field of gravity behaves in a similar way.

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This is how a chain reaction occurs when a radioactive substance explodes.

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Aerodynamics at home

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Glyphosate is a non-selective systemic herbicide used to control weeds. Among herbicides it ranks first in the world in terms of production volumes.

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Benz & Cie is the world's first car with an internal combustion engine, built in 1885 by the German inventor Carl Benz. It was officially granted patent #37435 on January 29, 1886.

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ELECTRON DIFFRACTION

Electron diffraction is the elastic scattering of a beam of electrons by atoms and/or molecules of a substance, which results in angularly deflected electron beams (so called diffraction beams) from the primary beam.

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Metal paperclip is held on water by surface tension

Molecules of a liquid experience mutual attraction forces. Inside the liquid, the attraction forces of other molecules act on all sides and therefore cancel each other out. Molecules on the surface of the liquid have no neighbors on the outside, and the resulting attraction force is directed inside the liquid. As a result, the entire water surface tends to shrink under the action of these forces.

Cumulatively, this effect leads to the formation of the so-called surface tension force, which acts along the liquid surface and results in the formation of a semblance of an invisible, thin and elastic film on it.

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Kinetic toy with tail spinning.

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Simple example of how hydraulics function.

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The Coriolis Force Apparatus

The Coriolis force is one of the forces of inertia used when considering the motion of a material point relative to a rotating reference frame. Adding the Coriolis force to the physical forces acting on the material point allows us to consider the effect of the rotation of the reference frame on this motion.

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The curved copper tube is first filled with water. A candle heats the tube and steam forms inside the tube, pushing the water out, causing it to rotate.

A vacuum is created in the coil, which draws in more water to repeat the process.

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The inverted glass contains air, keeping the water from penetrating into the glass and extinguishing the candle. The larger the volume of the glass beaker, the longer the candle will burn.
For burning, oxygen is needed.

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Illusion special effects pendulum in a spherical mirror.

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Physics can be fascinating as well as beautiful.

Luminescence of hydrogen under the action of an alternating electric field.

Viscoelastic fluid

It exhibits the elastic properties of solids and the irreversible flow properties of liquids.

Homemade heat machine with holiday spirit

Rotary motion results from the convection of hot air due to the flames of two tea candles.

Forced oscillations are motions that occur under the action of an external periodically changing force.

The world's largest hand-held flashlight.

The motion of the ball in the flow is explained by Bernoulli's principle — the difference of pressures acting on the surface of the ball from different sides.