The interaction of intense light with atoms or molecules can lead to the
generation of XUV pulses and energetic electron pulses with attoseconds duration
(1 attosecond=10-18 second). The advent of attosecond technology opens new
fields of time resolved studies in which the observation of fast electronic
dynamics can be attained.
The strong field light matter interaction encodes the spatial properties of the atomic or molecular system which contributes to the process. In my talk I will initially describe how we control the interaction to resolve the symmetry of atomic wavefunctions. In the following part I will describe how this interaction provides a direct insight into one of the most fundamental light matter interactions – tunnel ionization -- a fast evolving process which occurs during 100 attoseconds.