30551
This value is a dimensionless quantity formed by the ratio of two energies : the electrostatic energy of attraction ( or repulsion ) at a separation of one Compton wavelength , and the rest energy of the charge .
 Compton
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Compton