Page:The Meaning of Relativity - Albert Einstein (1922).djvu/134

122 Inductive action of accelerated masses, 113.

Inert and gravitational mass–equality of, 63.

Invariant, 10 et seq.

Isotropy of space, 17.

Kaluza, 108.

Levi-Civita, 77.

Light-cone, 42.

Light ray–path of, 102.

Light-time, 34.

Linear orthogonal transformation, 7.

Lorentz electromotive force, 46.

– transformation, 32.

Mach, 62, 109, 110, 111, 113, 119.

Mass and Energy, 48, 51.

– equality of gravitational and inert, 63.

– gravitational, 63.

Maxwell’s equations, 23.

Mercury–perihelion of, 103, 107.

Michelson and Morley, 29.

Minkowski, 34.

Motion of particle–equations of, 52.

Moving measuring rods and clocks, 39.

Multiplication of tensors, 14.

Newtonian gravitation constant, 98.

Operations on tensors, 14 et seq.

Orthogonality–conditions of, 7.

Orthogonal transformations–linear.

Path of light ray, 102.

Perihelion of Mercury, 103, 107.

Poisson's equation, 90.

Preferred systems of co-ordinates, 8.

Pre-relativity physics–hypotheses of, 27.

Principle of equivalence, 64.

– – inertia – criticism of, 65.

Principles of conservation, 55.

Radius of Universe, 118.

Rank of tensor, 14.

Ray of light–path of, 102.

Reference–space of, 4.

Riemann, 72.

– tensor, 82, 85, 110.

Rods (measuring) and clocks in motion, 39.

Rotation, 66.

Simultaneity, 17, 30.

Sitter, 29.

Skew-symmetrical tensor, 15.

Solar Eclipse expedition (1919), 103.

Space–concept of, 3.

– homogeneity of, 17.

– Isotropy of, 17.

Spaces of reference, 4; equivalence of, 26.

Special Lorentz transformation, 36.

Spectral lines–displacement of, 101.

Straightest lines, 86.

Stress tensor, 22.

Symmetrical tensor, 15.

Systems of co-ordinates–preferred, 8.

Tensor, 12 et seq, 72 et seq. – Addition and subtraction of, 14.

– Contraction of, 15.

– Fundamental, 74.

– Multiplication of, 14.