摂せつ動どう

noun, noun which may take the genitive case particle 'no'

perturbation

Technical term in physics for a small disturbance or change in a system, often used in contexts like orbital mechanics or quantum mechanics.

• 摂せつ動どう理り論ろんは量りょう子し力りき学がくでよく使つかわれる。

  Perturbation theory is often used in quantum mechanics.

• 惑わく星せいの軌き道どうに小ちいさな摂せつ動どうが観かん測そくされた。

  A small perturbation was observed in the planet's orbit.