Ultrafast timescales refer to extremely short durations on the order of femtoseconds (10^-15 seconds) to picoseconds (10^-12 seconds) during which rapid molecular and electronic processes occur. These timescales are crucial in understanding phenomena such as photodissociation and bond cleavage, where chemical bonds break and form in response to light. The ability to probe these ultrafast processes allows scientists to capture the dynamic changes in molecular structures as they transition through various states.
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