摘要
According to the controversial results of recent experiments for fifth force,we present a clasaiEcation of all poasibk types of theories leading to non-Newtonian forces.The theoretical analysis shows that if the interaction potential differs from the Newton's law the interactions of macro-and micro-bodies are in gen-eral dis£inguishable.The calculation also shows that Long's result can be improved by several orders if the new method proposed is used.