Last Updated
：2025/12/03
Kennelly-Heaviside layer
Noun
Japanese Meaning
約90～150kmの高度に存在する、電離したガスの層。中周波の電波を反射して、電波が地平線を超えて伝播するのを可能にする。
（ plural ）
Quizzes for review
A layer of ionized gas occurring between roughly 90–150 km (56–93 mi) above the ground. It reflects medium-frequency radio waves, and thus enables them to be propagated beyond the horizon.
音声機能が動作しない場合はこちらをご確認ください
See correct answer
Kennelly-Heaviside layer
Amateur radio operators rely on the Kennelly-Heaviside layer to reflect medium-frequency signals over long distances.
See correct answer
Amateur radio operators rely on the Kennelly-Heaviside layer to reflect medium-frequency signals over long distances.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
