Results 291 to 300 of about 8,651,536 (338)
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Radiation in a massive Schwarzschild background
Physical Review D, 1991We investigate the possibility of an important physical consequence arising from a recent theoretical observation by Kundu. This concerns the suppression of gravitational radiation from a weak source in the presence of a massive Schwarzschild background. We conclude that this result appears to be unlikely.
, Kozameh, , Newman, , Rovelli
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Cosmic Microwave Background Radiation
Reviews of Modern Physics, 1999Most astronomers and physicists now believe that we live in an expanding universe that evolved from an early state of extremely high density and temperature. Measurements of the spectrum and anisotropy of the cosmic microwave background radiation (CMBR) provide strong evidence supporting this picture. Today, the spectrum of the CMBR matches that of a 2.
Lyman Page, David Wilkinson
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THE UNIVERSAL ELECTROMAGNETIC BACKGROUND RADIATION
Soviet Physics Uspekhi, 1971CONTENTS Introduction 569 I. Radio Wavelengths 572 II. Infrared Wavelengths 577 III. Optical Wavelengths 581 IV. Ultraviolet Wavelengths 582 V. X-ray Wavelengths 585 VI.
M.S. Longair, Rashid A. Sunyaev
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DarkLight radiation backgrounds
AIP Conference Proceedings, 2013We report measurements of photon and neutron radiation levels observed while transmitting a 0.43 MW electron beam through millimeter-sized apertures and during beam-on, but accelerating gradient RF-on, operation. These measurements were conducted at the Free-Electron Laser (FEL) facility of the Jefferson National Accelerator Laboratory (JLab) using a ...
N. Kalantarians +1 more
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1976 International Conference on Submillimeter Waves and Their Applications, 1976
The existence of essentially isotropic homogeneous cosmic background radiation with the spectrum of a 3 K blackbody places important limits on cosmological speculations. This radiation has been the subject of intensive experimental investigation for more than a decade.
P. L. Richards, D. P. Woody
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The existence of essentially isotropic homogeneous cosmic background radiation with the spectrum of a 3 K blackbody places important limits on cosmological speculations. This radiation has been the subject of intensive experimental investigation for more than a decade.
P. L. Richards, D. P. Woody
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Infrared Astronomical Background Radiation
La Rivista del Nuovo Cimento, 1970Measurements of astronomical background radiation are interesting because when they succeed they tell us the energy budget of the universe — at least that part of the budget that gives rise to electromagnetic radiation. Neutrino and gravitational radiation background measurements would be required before a complete ledger could be set up.
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Soviet Atomic Energy, 1988
The data presented show that the yearly background dose equals on the average about 2 mSv (200 mrem). Two thirds of the dose is attributable to internal radiation from natural radionuclides—primarily the decay products of radon and thoron, entering the human body with inhaled air.
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The data presented show that the yearly background dose equals on the average about 2 mSv (200 mrem). Two thirds of the dose is attributable to internal radiation from natural radionuclides—primarily the decay products of radon and thoron, entering the human body with inhaled air.
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Radiation therapy‐associated toxicity: Etiology, management, and prevention
Ca-A Cancer Journal for Clinicians, 2021Kyle Wang
exaly