talks about research into pulsars, which are spinning neutron stars which emit beams of x-rays and radio waves from the star's magnetic pole, and states astronomers discovered increased brightness or dimness of ...
These observations have broadened the understanding of SN explosions, the propagation of shock waves and the properties of the ambient medium as well as the acceleration of cosmic rays in SNR shellsdoi:10.1016/s0920-5632(98)00188-1B. Aschenbach...
As long as the difference between the viewing angle and the jet angle is maintained, a continuous range of jet angles can be found that is consistent with the observations in X-rays and at radio wavelengths, mostly covering the peak. Dashed lines show light curves computed using the semi-...
x-rays 释义 常用 牛津词典 n. X光照片(x-ray的复数形式); vt. 照X光(x-ray的第三人称单数形式); 双语例句 全部 1. I had to go back for my checkup; they'd lost my X-rays. 我得回去再做一次体检。他们把我的X光片弄丢了。 来自柯林斯例句 2. The medical benefits of x-rays far outweigh...
X-rays and CT scans both use a small dose of ionizing radiation to produce images. An MRI scan, however, doesn’t work this way. It uses powerful magnets and radio waves to create the images instead of ionizing radiation. So, you are not exposed to radiation when you have an MRI scan...
As energetic electrons under the circumstances emit both X-rays by the bremsstrahlung mechanism and radio waves by the gyrosynchrotron mechanism simultaneously, it is shown that the radio flux density is closely related to the X-ray flux density. Solving an integral equation describing the X-ray ...
X-rays are a form of electromagnetic radiation, on a spectrum (频谱) that runs from radio waves on the low end to gamma rays on the high end and includes visible light, too. Scientists don’t know why lightning spawns X-rays. They theorize it involves a "runaway breakdown" of the air...
X-rays and Gamma Rays are high frequency electromagnetic radiation:Energy and IonizationGamma rays, X-rays, and some ultraviolet waves have such high energy that they are ionizing, meaning they can knock electrons out of atoms.This makes atoms charged and more likely to form new chemical ...
Therefore, an X-ray has higher energy compared to other electromagnetic waves except for cosmic rays. The X-rays with low energy levels cannot penetrate thicker materials, whereas those with high energy levels cannot provide low-contrast information. The energy range of the useful X-rays for ...
X-ray - Radiation, Imaging, Diagnosis: X-rays are a form of electromagnetic radiation; their basic physical properties are identical to those of the more familiar components of the electromagnetic spectrum—visible light, infrared radiation, and ultravio