English Dictionary

Ehrenfest paradox

固有名詞

(physics) A relativistic paradox concerning the concept of Born rigidity within special relativity, where an ideally rigid cylinder that is made to rotate about its axis of symmetry. The radius R as seen in the laboratory frame is always perpendicular to its motion and should therefore be equal to its value R₀ when stationary. However, the circumference should appear Lorentz-contracted to a smaller value than at rest. This leads to the contradiction that R = R₀ and R < R₀.

日本語の意味

特殊相対性理論において、ボーン剛体性の概念に関連するパラドックス。具体的には、理想的な剛体と考えられる回転する円筒で、実験室系では回転軸に対して垂直な半径は静止時と同じ値（R₀）であるのに対し、周囲はローレンツ収縮により静止時の値よりも短く観測されるために生じる矛盾を説明する。

The Ehrenfest paradox highlights a conflict between Born rigidity and Lorentz contraction when one considers an ideally rigid cylinder set rotating about its symmetry axis.

Born剛性に関するこの相対論的逆説は、理想的に剛体な円柱をその対称軸まわりに回転させると、特殊相対性理論が予測するローレンツ収縮と矛盾するという問題を浮き彫りにする。

意味（1）

(physics) A relativistic paradox concerning the concept of Born rigidity within special relativity, where an ideally rigid cylinder that is made to rotate about its axis of symmetry. The radius R as seen in the laboratory frame is always perpendicular to its motion and should therefore be equal to its value R₀ when stationary. However, the circumference should appear Lorentz-contracted to a smaller value than at rest. This leads to the contradiction that R = R₀ and R < R₀.

the Ehrenfest paradox （ canonical ）