Assertion: cosmic ray | /r/CapableOf | arrive at earth
Facets:
value: from all directions
type: TRANSITIVE-OBJECT
value: from millions of electron volts
type: OTHER
value: with an impressive energy range
type: OTHER
value: for a given area
type: OTHER
value: for a given angle
type: PURPOSE
Source sentences:
text: When cosmic rays arrive at Earth, they can collide with the nuclei of atoms in the atmosphere, creating a shower of billions of secondary particles.
text: Since cosmic rays are actual particles, trajectories are bent between when they left their original source and when they arrive on earth, making it difficult to know the exact origin of an individual cosmic ray.
text: Physicists use the cosmic-ray flux, i.e., the rate at which cosmic rays arrive at Earth for a given area and a given angle, to compare measurements from different detectors.
text: We also know cosmic rays arrive at Earth with an impressive energy range: from millions of electron volts – an electron volt (eV) is the amount of energy gained by the charge of a single electron when it is moved across an electric potential difference of one volt – up to more than 1021 eV (the number 1 with 21 zeroes after it!).
text: This was because the Sun was thought to emit little but visible light, and, of course, cosmic rays are isotropic and would arrive at Earth from all directions.