hydrogen maser वाक्य
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- A "'hydrogen maser "', also known as hydrogen frequency standard, is a specific type of maser that uses the intrinsic properties of the hydrogen atom to serve as a precision frequency reference.
- NIST-F1 is at the top of the time-keeping pyramid and is used to calibrate other clocks, including three cesium clocks and five hydrogen maser clocks that are averaged to create NIST's standard.
- Gravity Probe A, also called the Redshift Experiment, used an extremely precise hydrogen maser clock to confirm part of Einstein's Scout rocket, and remained in space for near two hours, as intended.
- Among the most stable frequency references in the world are cesium standards, including standards laboratories use ensembles of cesium standards and hydrogen masers in order to combine the best attributes of both.
- In a hydrogen maser clock the gas emits microwaves ( the gas " mases " ) on a hyperfine transition, the field in the cavity oscillates, and the cavity is tuned for maximum microwave amplitude.
- Ramsey could therefore confidently proceed with the building of the hydrogen maser . " Jen was the author of numerous entries on microwave physics in the " McGraw-Hill Encyclopedia of Science and Technology " and in the " Encyclopedia of Physics ".
- A very accurate gravitational redshift experiment, which deals with this issue, was performed in 1976, where a hydrogen maser clock on a rocket was launched to a height of 10, 000 km, and its rate compared with an identical clock on the ground.
- Ramsey and his PhD student Daniel Kleppner developed the atomic hydrogen maser, looking to increase the accuracy with which the the second has been defined based on 9, 192, 631, 770 hyperfine transition of a cesium-133 atom; the atomic clock which is used to set this standard is an application of Ramsey's work.
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