ドップラー
解説 Definition
Doppler は物理学者 Christian Doppler の姓に由来する固有名詞です。ドップラー効果やドップラーレーダーなど、波の周波数の変化に関係する用語で使われます。
Doppler is the surname of physicist Christian Doppler and, attributively, identifies effects, measurements, and technologies based on the observed change in wave frequency caused by relative motion. It commonly occurs in terms such as Doppler effect, Doppler radar, and Doppler ultrasound.
覚え方のコツ Memory Tip
Doppler は現象を説明した物理学者 Christian Doppler の姓で、通常は大文字で書きます。音源や観測者が動くと、近づく音は高く、遠ざかる音は低く聞こえる場面を Doppler effect と結び付けましょう。Doppler radar、Doppler ultrasound のように、波の変化を測る技術名にも使われます。
Treat Doppler as a capitalized name attached to a scientific idea. Imagine an ambulance siren: its pitch sounds higher as it approaches and lower as it moves away. That change connects relative motion with the Doppler effect and makes the name memorable. The same principle supports Doppler radar, which measures motion using reflected waves, and Doppler ultrasound, which can assess moving blood. Because the word comes from Christian Doppler’s surname, do not try to divide it into English prefixes or suffixes; learn it through these standard scientific combinations.
例文
The lesson introduced the Doppler effect.
授業ではドップラー効果が紹介されました。
A Doppler radar can help track storm movement.
ドップラーレーダーは嵐の動きを追跡するのに役立ちます。
The scientist described how Doppler measurements are used in medicine.
その科学者は、ドップラー測定が医療でどのように使われるかを説明しました。
doppler の類義語・関連語
派生語
紛らわしい語
doppler の語源・成り立ち Etymology
英語Dopplerは、現象を記述したオーストリアの物理学者Christian Dopplerの姓から来た語で、ドイツ語圏の固有名が一般名詞化しました。人名由来なので分解はしませんが、Doppler effectやDoppler radarのように、彼の理論に基づく現象や装置を指す語へ広がりました。
Doppler comes from the surname of Christian Doppler, the Austrian physicist who described the frequency shift now called the Doppler effect in the nineteenth century. English adopted his name as an eponym in scientific compounds. It was then extended from the effect itself to instruments, techniques, and measurements that use frequency changes to detect motion, including Doppler radar and medical Doppler ultrasound. As a personal name used attributively, it is conventionally capitalized.
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