Hydrogen maser (Microwave Amplification by Stimulated Emission of Radiation). A maser produces microwaves via atomic resonance (vibrational energy),a phenomenon that occurs when atoms are excited to a point where they emit radiation. A hydrogen maser is a specific type of maser used as a timing standard. Together with other kinds of atomic clocks,hydrogen masers are used to help define International Atomic Time. Photographed at SYRTE (Space-Time Reference Systems),Observatoire de Paris,France | |
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Credit: | Science Photo Library / LOOK AT SCIENCES / EURELIOS / PATRICE LATRON |
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