1 Raised over Fort McHenry on the morning of September 14, 1814, to signal American victory over the British in the Battle of Baltimore; the sight inspired Francis Scott Key to write The Star-Spangled Banner. 2  Preserved by the Armistead family as a memento of the battle.
London dispersion forces are a type of intermolecular force. They are relatively weak. They are also called induce-dipole induce-dipole interactions. 1  Present in non-polar molecules.  Due to non-systematic electron distribution where one molecule induces a dipole on another molecule.
This will attract other dipole molecules, which will bind to the first dipole with the first dipoles positive side to the others negative side. The molecules will be kept together by electrostatic forces. London dispersion forces are forces between atoms/molecules which is by default non-dipole. It's pretty much a spontaneous reaction, and happens thanks to the fluctuation in a non-dipoles electron cloud.