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.
sunlight varies with season and time of day, solar energy fallson the United States at an average intensity of 200 W/m2. || LASIK eye surgery uses pulses of laser light to shave off tis-sue from the cornea, reshaping it. A typical LASIK laser emits a1. 0-mm-diameter laser beam with a wavelength of 193 nm. Each laser pulse lasts 15 ns and contains 1. 0 mJ of light energy.