It is unclear whether this would provide enough filtration from the gas. MacGyver rips his shirt and uses it as a temporary mask for himself and Barbara Spencer to enter the area with the toxic gas.He then turns on the water, and the hydraulic pressure in the hose causes the beam to lift enough for him to shift it out of the way. When MacGyver needs to move a large steel beam blocking his way, he cuts the end off a fire hose, ties a knot in the hose, and runs the hose under the beam.MacGyver uses Barbara's shoes to send Morse Code to Barbara who is trapped in the lab behind some rubble.The wavelength of a carbon dioxide laser is also readily absorbed by normal glass and optics, which makes MacGyver's feat all the more impressive. These operate at a wavelength of approximately 10 micrometers (infrared) and are thus invisible no matter how much smoke is in the air. ![]() As a side note, the episode states that the laser is a carbon dioxide laser. After seeing the smoke, he smashes a pair of binoculars, removing a prism to deflect a laser beam back to the emitter and destroys it.
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