Naslov
Einstein: from Special Theory of Relativity (1905), through General Theory of Relativity (1916), until Cosmological Term (1917)

Autori
Pisk, Krunoslav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts MATH/CHEM/COMP 2005 Dubrovnik International Course & Conference on the Interfaces among Mathematics, Chemistry and Computer Sciences / Graovac, Ante ; Pokrić, Biserka, Smrečki, Vilko - Zagreb : Institut Ruđer Bošković, 2005

Skup
MATH/CHEM/COMP 2005

Mjesto i datum
Dubrovnik, Hrvatska, 20.06.2005. - 25.06.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
special relativity; general relativity

Sažetak
1905 – Special Theory of Relativity (STR) About uniform motion in empty space and relative motions with uniform translations among frames of reference. The speed of light is constant in inertial frames. A new concept of space and time: space-time continuum as an integral entity. Lorentz transformations as coordinate links among different frames. Relations among observables. Relativity of lengths and time intervals. Equations which express physical laws are form-invariant (covariant) against Lorentz transformations. A new relation between mass and energy, E=mc^2, emerges naturally. 1916 – General Theory of Relativity (GTR) Extension of STR by imposing that equations of law of physics are form-invariant against general space-time transformations (general covariance), which also include coordinate relations among accelerated frames. Accelerated frames and gravitational fields (principle of equivalence). Gravitation and curvature of space. Equations of GTR: a) Einstein’ s field equations - energy (mass) – distribution and corresponding pressures, as a source of curved space ; b) Einstein’ s equations of motion – motion of material particle in gravitational field. GTR and Newton’ s laws of motion and gravitation. 1917- Cosmological Term When applied to the Universe, solution of field equations of GTR are not static. Einstein modifies original equations by introducing a cosmological term (cosmological constant today) - lambda, which is consistent with relativity postulates. Now, a quasi-static distribution of matter in Universe is possible. The Universe appears a 3-dimensional curved space (with constant radius of curvature R) and finite volume of 2pi^2R^3, with lamda=1/R^2.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA