To the world of physics, 137 is synonymous with the fine structure constant. This constant, represented as approximately 1/137.03599913, gauges the strength of the electromagnetic force, according to the National Institute of Standards and Technology. This force governs how charged elementary particles, like electrons, interact with light's photons.
The National Institute of Standards and Technology describes the fine-structure constant as one of the universe's key physical constants. Michael Brooks, in a New Scientist article, explains, "This immutable number determines how stars burn, how chemistry happens and even whether atoms exist at all."
In this video, British physicist Laurence Eaves explains that if the fine structure constant was a different value, "physics, chemistry, biochemistry would be totally different – and we might not be around to talk about it."
In December 2020, the journal Nature reported a breakthrough. A group led by Saïda Guellati-Khélifa at the Kastler Brossel Laboratory in Paris reported the most precise measurement of the fine-structure constant. Their findings, which were almost three times more precise than the previous best measurement in 2018, showcased the constant’s value to the 11th decimal place.