What is the distance dependence of Van der Waals forces?

The distance dependence of Van der Waals forces follows a nuanced pattern known as the Inverse Cubic Law. While the attractive component of Van der Waals forces theoretically varies inversely with the seventh power of the distance between interacting particles, it is commonly approximated as varying inversely with the sixth power (or cubic of the distance between the centers of two atoms or molecules) for simplicity. This means that as the distance between particles increases, the strength of these forces decreases rapidly. Understanding this approximation is essential for simplifying calculations and gaining insights into the delicate balance of forces that characterize Van der Waals interactions.