The Passage of An Ultrashort Laser Pulse in the Air (video) Institute of Physical Chemistry of the Polish Academy of Sciences Share Print E-Mail Loading video... Caption In the middle of the corridor the pulse passes through a cloud of condensed water vapor. Credit IPC PAS Usage Restrictions None. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.