Last Updated：2025/11/25

Dictionary quizzes to help you remember the meaning

Dictionary quizzes to help you remember the meaning

Planck length

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Source Word

Planck length

(physics) A unit of length, believed to be the smallest length that has physical meaning, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ℓ_P=√hbar Gc³≈1.616 252(81)⨯10⁻³⁵ mbox meters

Japanese Meaning

プランク長：物理学で用いられる長さの単位。光速、万有引力定数、換算プランク定数を用いて定義され、物理的意味を持つ最小の長さと考えられている。

What is this buttons?

Physicists hypothesize that space-time may cease to have a classical description at distances comparable to the Planck length.

Google Translation / DeepL Translation

物理学者は、時空が古典的な記述を保てなくなるのは、光速・重力定数・換算プランク定数で定義される基本的な長さのスケール、すなわちプランク長さと同程度の距離であると仮定している。

Sense（1）

(physics) A unit of length, believed to be the smallest length that has physical meaning, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ℓ_P=√hbar Gc³≈1.616 252(81)⨯10⁻³⁵ mbox meters

Planck lengths

（ plural ）

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