Suppose you went to the beach and you shoot a laser beam over the ocean, perfectly horizontal. The beam starts at sea-level, exactly. How far above the ocean surface will the laser
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Laser Tools 6371 14mm 3/8 Drive Spark Plug Wobble Socket FITS BMW Double Cut LL 5018341063719 | eBay
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Continuous-wave single-frequency laser with dual wavelength at 1064 and 532 nm
