The vibrational excitation of the hydrogen molecule promotes dissociation on low index surfaces of copper.

The low index medium can be thought of as a potential barrier through which photons can tunnel.

It seems to me that people in their fifties or above should almost always choose high fixed rather than low indexed income.

This inverse metric can be contracted with a lower index to produce an upper index.

Persons most closely related to the original settlers have the lowest index number.