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The Frank–Tamm formula yields the amount of Cherenkov radiation emitted on a given frequency as a charged particle moves through a medium at superluminal velocity. It is named for Russian physicists Ilya Frank and Igor Tamm who developed the theory of the Cherenkov effect in 1937, for which they were awarded a Nobel Prize in Physics in 1958.

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  • Frank–Tamm formula (en)
  • フランク＝タムの公式 (ja)
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  • フランク＝タムの公式（フランク＝タムのこうしき、英: Frank–Tamm formula）は、荷電粒子が物質中での光速を超える場合に放出されるチェレンコフ放射の、単位長さあたりの放射エネルギーの周波数スペクトルを求める公式である。1937年にチェレンコフ放射の理論的説明を与えたロシアの物理学者イリヤ・フランクとイーゴリ・タムにちなんで名付けられ、彼らはこの功績により1958年にノーベル物理学賞を受賞した。 荷電粒子が物質中の光の位相速度を超えた場合、その粒子からエネルギーと運動量を保存する形でコヒーレントな光子が放出されうる。このプロセスは崩壊と見なすこともできる。 (ja)
  • The Frank–Tamm formula yields the amount of Cherenkov radiation emitted on a given frequency as a charged particle moves through a medium at superluminal velocity. It is named for Russian physicists Ilya Frank and Igor Tamm who developed the theory of the Cherenkov effect in 1937, for which they were awarded a Nobel Prize in Physics in 1958. (en)
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  • The Frank–Tamm formula yields the amount of Cherenkov radiation emitted on a given frequency as a charged particle moves through a medium at superluminal velocity. It is named for Russian physicists Ilya Frank and Igor Tamm who developed the theory of the Cherenkov effect in 1937, for which they were awarded a Nobel Prize in Physics in 1958. When a charged particle moves faster than the phase speed of light in a medium, electrons interacting with the particle can emit coherent photons while conserving energy and momentum. This process can be viewed as a decay. See Cherenkov radiation and nonradiation condition for an explanation of this effect. (en)
  • フランク＝タムの公式（フランク＝タムのこうしき、英: Frank–Tamm formula）は、荷電粒子が物質中での光速を超える場合に放出されるチェレンコフ放射の、単位長さあたりの放射エネルギーの周波数スペクトルを求める公式である。1937年にチェレンコフ放射の理論的説明を与えたロシアの物理学者イリヤ・フランクとイーゴリ・タムにちなんで名付けられ、彼らはこの功績により1958年にノーベル物理学賞を受賞した。 荷電粒子が物質中の光の位相速度を超えた場合、その粒子からエネルギーと運動量を保存する形でコヒーレントな光子が放出されうる。このプロセスは崩壊と見なすこともできる。 (ja)
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