Distances shorter than 1 pm

This page lists lengths shorter than 1 picometre (10⁻¹² m).

Femtometre scale

1 × 10⁻¹³ metres = 100 fm = 0.1 pm.

≈ 1 × 10⁻¹³ metres = 1 x unit

1 × 10⁻¹⁴ metres = 10 fm

7 fm - the radius of the effective scattering cross section for a gold nucleus scattering a 6 MeV alpha particle over 140 degrees

1.5 fm — diameter of the Scattering Cross Section of an 11 MeV proton with a target proton

1 × 10⁻¹⁵ metres = 1 fm = 1 femtometre = 1,000 attometres

850 am = 0.85 fm — approximate proton radius

1 × 10⁻¹⁶ metres = 100 am

1 × 10⁻¹⁷ metres = 10 am

1 × 10⁻¹⁸ metres = 1 am = 1 attometre = 1,000 zeptometres

1.0 am — sensitivity of the LIGO detector for gravitational waves.

1 × 10⁻¹⁹ metres = 100 zm

1 × 10⁻²⁰ metres = 10 zm

7 × 10⁻²¹ metres = radius of effective cross section for a 250 GeV neutrino scattering off a nucleon

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