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The background flux at these wavelengths accordingly seems to be strongly dominated by the direct starlight from galaxies, thus excluding a large contribution from other sources-in particular from the first stars formed. This result also indicates that intergalactic space is more transparent to gamma...
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The movement in the directions of the electrons or positrons, and acceleration to velocities near to the speed of light, led to the accumulative storage ring, are then changed by a magnetic field under vacuum [10]. Characteristics of synchrotron radiation are (1) light of strong intensity, (...
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英语翻译一、In the process of vision,rays of light from an object are refracted (bent) as they pass through the cornea(a transparent,protective layer) and lens are focused it by way of the optic nerve to the brain for interpretation.the iris adjusts the
1.A one-piece optical element made of an optically transparent material for focusing an input bundle of collimated rays around an optical axis in a focal region around a focal point bounded on an entry side by a truncated cone centered relative to the optical axis with a top surface pointing...