“cosmic radiation”的概念、定义、习题解题方法及翻译-物理辞典

单词	cosmic radiation
释义	cosmic radiation High-energy particles that fall on the earth from space. Primary cosmic rays consist of nuclei of the most abundant elements, with protons (hydrogen nuclei) forming by far the highest proportion; electrons, positrons, neutrinos, and gamma-ray photons are also present. The particle energies range from 10^-11 J to 10 J (10⁸ to 10²⁰ eV) and as they enter the earth's atmosphere they collide with oxygen and nitrogen nuclei producing secondary cosmic rays . The secondary rays consist of elementary particles and gamma-ray photons. A single high-energy primary particle can produce a large shower of secondary particles. The sources of the primary radiation are not all known, although the sun is believed to be the principal source of particles with energies up to about 10¹⁰ eV. It is believed that all particles with energies of less than 10¹⁸ eV originate within the Galaxy
随便看	parallel circuits parallel processing parallel spins parallelepiped parallelogram of forces parallelogram of vectors parallelogram of velocities paramagnetism parametric equation parasitic capture paraxial ray parent parity parsec partial partial derivative partial eclipse partial pressure particle particle physics particle-beam experiments particle-in-a-box partition partition coefficient partition function

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。