Germany became a modern, unified nation under the leadership of the âIron Chancellorâ Otto von Bismarck (1815-1898), who between 1862 and 1890 effectively ruled first Prussia and then all of Germany.
Laser effects on the skin. Thermal (burn) injury is the most common cause of laser induced skin damage. Thermal damage is generally associated with lasers operating at exposure times greater than 10 microseconds and in the wavelength region from the near ultraviolet to the far infrared.
However, if you dim the light you should see the same effects using your laser pointer, only better. 1  Fill the glass with clear water and place a white sheet of paper behind the glass. 2  Shine with the laser pointer through the water (see picture a) below).  Add a small amount of milk and stirr untill it is mixed.