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There has been a long debate about whether uniformly accelerated charges should radiate electromagnetic energy and how one should describe their worldline through a flat spacetime, i.e., whether the Lorentz-Dirac equation is right. There are related questions in curved spacetimes, e.g., do different varieties of equivalence principle apply to charged particles, and can a static charge in a static spacetime radiate electromagnetic energy? The problems with the LD equation in flat spacetime are spelt out in some detail here, and its extension to curved spacetime is discussed. Different equivalence principles are compared and some vindicated. The key papers are discussed in detail and many of their conclusions are significantly revised by the present solution.

Particle acceleration. --- Dirac equation. --- Differential equations, Partial --- Quantum field theory --- Wave equation --- Particles (Nuclear physics) --- Acceleration (Mechanics) --- Nuclear physics --- Acceleration --- Particle and Nuclear Physics. --- Classical and Quantum Gravitation, Relativity Theory. --- Theoretical, Mathematical and Computational Physics. --- Classical Electrodynamics. --- Nuclear physics. --- Gravitation. --- Mathematical physics. --- Optics. --- Electrodynamics. --- Dynamics --- Physics --- Light --- Physical mathematics --- Field theory (Physics) --- Matter --- Antigravity --- Centrifugal force --- Relativity (Physics) --- Atomic nuclei --- Atoms, Nuclei of --- Nucleus of the atom --- Mathematics --- Properties

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This is the updated, widely revised, restructured and expanded third edition of Léna et al.'s successful work Observational Astrophysics. It presents a synthesis on tools and methods of observational astrophysics of the early 21st century. Written specifically for astrophysicists and graduate students, this textbook focuses on fundamental and sometimes practical limitations on the ultimate performance that an astronomical system may reach, rather than presenting particular systems in detail. In little more than a decade there has been extraordinary progress in imaging and detection technologies, in the fields of adaptive optics, optical interferometry, in the sub-millimetre waveband, observation of neutrinos, discovery of exoplanets, to name but a few examples. The work deals with ground-based and space-based astronomy and their respective fields. And it also presents the ambitious concepts behind space missions aimed for the next decades. Avoiding particulars, it covers the whole of the electromagnetic spectrum, and provides an introduction to the new forms of astronomy becoming possible with gravitational waves and neutrinos. It also treats numerical aspects of observational astrophysics: signal processing, astronomical databases and virtual observatories.

Astronomical instruments. --- Astronomy -- Observations. --- Astrophysics -- Observations. --- Astrophysics --- Astronomy --- Astronomical instruments --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Instruments, Astronomical --- Astronomical observations --- Observations, Astronomical --- Astronomical physics --- Instruments --- Physics. --- Astrophysics. --- Microwaves. --- Optical engineering. --- Astrophysics and Astroparticles. --- Microwaves, RF and Optical Engineering. --- Signal, Image and Speech Processing. --- Optical instruments --- Physical instruments --- Scientific apparatus and instruments --- Space optics --- Cosmic physics --- Physics --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Signal processing. --- Image processing. --- Speech processing systems. --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Mechanical engineering