The Photofragmentation Dynamics Laboratory largely focuses on the experimental determination of molecular dissociation upon absorption of a single UV photon. A rotatable beam machine is employed to study the photodissociation process of small molecules by translational spectroscopy. In these experiments, molecules in a beam are crossed by a linearly polarized light, and the mass, translational energy, intensity, and direction of the resulting fragments are determined by the time-of-flight technique. From the measured translational energy distributions and angular dependence of the recoiling products, information on the excited state involved in the transition and the branching ratio of the dissociation pathways is derived.