2019-10-14T16:36:31.702Z per metre SI derived unit of quantity with dimension of reciprocal length, e.g., wave number, optical power, curvature, spatial frequency https://api.github.com/users/kurt-hectic kurt-hectic SI derived unit of quantity with dimension of reciprocal length, e.g., wave number, optical power, curvature, spatial frequency per metre m-1 2020-04-29T14:26:16.527Z 2021-11-04T10:19:56.237Z m-1 4 2020-04-29T14:25:37.071Z