Light in metric space-time and its deflection by the screw dislocation

We explain the geometrical meaning of the metric of space-time. Then, we derive the light deflection caused by the screw dislocation in space-time. The derivation is based on the idea that space-time is a medium which can be deformed in such a way that the deformation of space-time is equivalent to the existence of metric which is equivalent to gravity. The existence of the screw dislocation in the cosmology is hypothetically confirmed by observation of light bursts which can be interpreted as the annihilation of the giant screw dislocations with anti-dislocations. The origin of gravitational bursts are analogical to the optical ones. Hubble telescope is able to detect only the optical bursts. The gravitational bursts then can be detected by LIGO, VIRGO, GEO, TAMA and so on. The dislocation theory of elementary particles is discussed.