Examlex
What time period is considered the "golden age" of radio?
Open System
A system that exchanges both energy and matter with its surroundings, characteristic of most natural and biological systems.
Closed System
A physical system that does not exchange matter with its surroundings, though it may exchange energy.
Penetrating Radiation
Radiation that can penetrate through substances and materials, potentially causing ionization of atoms.
Gamma
A type of high-energy electromagnetic radiation, often associated with nuclear reactions and certain types of radioactive decay.
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