Abstract
This research aims to study the transmission of the laser in the water by using several types of water are (distilled water, water Tigris River, tap water , rain water , through studying the relation between transmittance of laser beams and the length of intersected orbit through the water environment .by using a number of The lasers the laser of He-Ne laser with wave length of 632 nm with power reads 2.04 mw the laser Nd-YAG laser with tow wave length that are 1064 nm with power 88.3 and the second length wave is 532 nm with power 40 m. laser beams transfer through the water channel, Throughout dealing with this study concluded that transmittance decrease with increasing the depth of crossed orbit for all kinds of laser. The decrease of transmittance results from the kind of laser , depth of orbit , the kind of water and power of laser.
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