Length scale (or "scale length"), a significant concept in physics used to define the order of magnitude of a system
Richter magnitude scale | scale | Moment magnitude scale | Fujita scale | Scale model | Run-length encoding | scale model | Scale insect | Rostral scale | Planck length | Length overall | Scoville scale | Mercalli intensity scale | International Scale of River Difficulty | Focal length | Beaufort scale | Amplified fragment length polymorphism | Synoptic scale meteorology | Supralabial scale | Small-scale agriculture | Rankine scale | moment magnitude scale | Medvedev–Sponheuer–Karnik scale | Hamilton Rating Scale for Depression | foot (length) | 35 mm equivalent focal length | Wechsler Adult Intelligence Scale | Variable-length code | Unequal leg length | Truck scale |
It uses a scalar field of infinite length scale (i.e. long-ranged), so, in the language of Yukawa's theory of nuclear physics, this scalar field is a massless field.