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Фізика (622)

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Зображення

EN_01163426_0001
EN_01163426_0001

Electromagnetic particle shower. Particle tracks (moving from bottom to top) showing multiple electron-positron pairs created from the energy of a high-energy gamma ray photon produced by a neutrino collision. The positron is the anti-particle of the electron, and this process is called ^Ipair-creation^i. Electrons and positrons are charged particles and form these paired spirals as they curve away from each other in a magnetic field. As they do so, they radiate photons, which can in turn produce new electron-positron pairs. This shower of particle creation continues until the energy of the original photon is used up. The region shown here is about 2 metres tall.

EN_01163426_0013
EN_01163426_0013

^BElectromagnetic spectrum.^b Computer artwork of the electromagnetic (EM) spectrum (across centre) and the component colours of visible light (across bottom). The changing wavelength of EM radiation through the spectrum is shown by the trace across top. At the high wavelength end of the spectrum are (from left to right) gamma rays, X-rays and ultraviolet light. In the centre of the EM spectrum are wavelengths that the human eye can see, known as visible light. Visible light comprises light of different wavelengths and energies, and hence colours. At the low wavelength end of the EM spectrum (centre to right) are infra red radiation, microwaves and radio waves.

EN_01151355_0473
rmEN_01151355_0473

Stanene sheet. Computer artwork showing the molecular structure of a sheet of stanene. Stanene is the name given by researchers to 2-dimensional sheets of tin (silver-coloured) that are only 1-atom thick, in a manner similar to graphene. Stanene is a theoretical topological insulator that may display superconductivity at its edges above room temperature. The addition of fluorine (green) atoms to the tin lattice could extend the critical temperature up to 100 degrees Celsius.

EN_01151355_1883
rmEN_01151355_1883

Superstring theory is an attempt to explain all of the particles and fundamental forces of nature in one theory by modelling them as vibrations of tiny supersymmetric strings. Superstring theory is a shorthand for supersymmetric string theory because unlike bosonic string theory, it is the version of string theory that incorporates fermions and supersymmetry. Since the second superstring revolution the five superstring theories are regarded as different limits of a single theory tentatively called M-theory, or simply string theory.

EN_00966278_4058
rmEN_00966278_4058

Illustration of an atomic reaction, the concept of a matter-antimatter collision. A matter-antimatter reaction is believed to be 100% efficient, with all mass converted into energy.

EN_00966278_4352
rmEN_00966278_4352

Illustration of the pi symbol.

EN_00966278_4386
rmEN_00966278_4386

"Neurons," a computer generated fractal image.

EN_00966278_4387
rmEN_00966278_4387

"Energy," a computer generated fractal image.

EN_00966278_4388
rmEN_00966278_4388

"Energy," a computer generated fractal image.

EN_00966278_4389
rmEN_00966278_4389

"Man and Energy," a computer generated fractal image.

EN_00966278_4393
rmEN_00966278_4393

"Hyperbolas," a computer generated fractal image.

EN_00966278_4394
rmEN_00966278_4394

"Hyperbolas," a computer generated fractal image.

EN_00966278_4396
rmEN_00966278_4396

"Lines of Force," a computer generated fractal image.

EN_00966278_4397
rmEN_00966278_4397

"Lines of Force," a computer generated fractal image.

EN_00966278_4400
rmEN_00966278_4400

"Nebula," a computer generated fractal image.

EN_00966278_4402
rmEN_00966278_4402

"Strings and Superstrings," a computer generated fractal image.

EN_00966278_6132
rmEN_00966278_6132

Illustration of a prism and a spectrum.

EN_00966299_2488
rmEN_00966299_2488

Illustration of magnetic fields and how they attract.

EN_00966299_2489
rmEN_00966299_2489

Illustration of magnetic fields and how they repel.

EN_00966299_2490
rmEN_00966299_2490

Illustration of magnetic fields and how they exert electromagnetic attraction.

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