Planck length References Planck length physics Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: cosmology/ Superunification and the Planck eraThe combination, called the Planck length (Gh/c3)1/2, equals roughly 10−33 cm, far smaller than the distances to which elementary particles can be probed in particle accelerators on Earth. Read MoreThe combination, called the Planck length (Gh/c3)1/2, equals roughly 10−33 cm, far smaller than the distances to which elementary particles can be probed in particle accelerators on Earth. Read More