To put this in context, a femto-second is a quadrillionth of a second.

For reference, an attosecond is one quintillionth of a second.

One attosecond is 10-18 seconds, or one billionth of one billionth of a second.

This high energy attosecond radiation could be used to study ultrarapid electronic processes.

An attosecond is also about the length of time it takes for light to move between neighbouring atoms.

For context, an attosecond is to a second what a second is to about 31.71 billion years.

The reported work represents the first attosecond transient absorption spectroscopy (ATAS) experiment on a polyatomic molecule.

We measured them with attosecond precision, and our measurements agreed perfectly with the calculations.

At just 10-18 seconds, an attosecond is to one second what one second is to the age of the universe.

Put another way, an attosecond is to a second what a second is to approximately 31.7 billion years.

An attosecond (AS) is to a second what a second is to about 31.71 billion years.

For reference, one attosecond is to one second as one second is to about 31.71 billion years.

At just 10-18 seconds, an attosecond is to one second what one second is to the age of the universe.

For context, a femtosecond is to a second as a second is to about 31.7 million years.

For context, a femtosecond is to a second what a second is to about 31.7 million years.