Modern Physics · relativity

Length Contraction

Relates observed length parallel to motion to proper length.

ℓ = ℓ₀ / γ

Copy formats

Variables

ℓ
observed lengthm
ℓ₀
proper lengthm
γ
Lorentz factor

Conditions / notes

Applies along the direction of relative motion in special relativity.

Reference details

Subject
Modern Physics
Topic
relativity
Plain text
l = l0 / gamma

Your privacy

Privacy settings

Essential site features work without optional analytics. Optional analytics is currently disabled site-wide and remains off unless both you consent and the owner later enables the verified service.

Essential storage

Used for choices you make on this device, such as theme, favorites, and this privacy preference. It cannot be switched off here.

Always available

This preference panel is not a Google-certified consent management platform and does not authorize advertising. Future advertising in applicable regions requires separate certified CMP configuration.