For the metre - BIPM

Standard frequencies - TITLE

Recommended values of standard frequencies

For the metre - INTRO

The radiations listed below may be used for the practical realization of the metre.

Asset Publisher

Wavelength ≈ 237 nm

Wavelength ≈ 243 nm

Wavelength ≈ 265 nm

Wavelength ≈ 267 nm

Wavelength ≈ 282 nm

Wavelength ≈ 436 nm

Wavelength ≈ 467 nm

Wavelength ≈ 515 nm

Wavelength ≈ 531 nm

Wavelength ≈ 532 nm

Wavelength ≈ 543 nm

Wavelength ≈ 576 nm

Wavelength ≈ 578 nm

Wavelength ≈ 606 nm

Wavelength ≈ 612 nm

Wavelength ≈ 633 nm

Wavelength ≈ 633 nm

Wavelength ≈ 640 nm

Wavelength ≈ 657 nm

Wavelength ≈ 674 nm

Wavelength ≈ 698 nm

Wavelength ≈ 698 nm

Wavelength ≈ 729 nm

Wavelength ≈ 778 nm

Wavelength ≈ 780 nm

Wavelength ≈ 1.54 µm

Wavelength ≈ 3.39 µm

Wavelength ≈ 10.3 μm