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UrduOptical tweezers manipulate tiny things like cells and nanoparticles using lasers. While they might sound like tractor beams from science fiction, the fact is their development garnered scientists a Nobel Prize in 2018.
Tag: laser light
Playing all the angles: A high-contrast grating structure for direction-tunable lasing
Lasers find applications across several fields ranging from telecommunications and remote sensing to medicine.
Stay 6 Feet Apart. Mechanically Simulated Cough Reveals That May Not be Enough
A preliminary, flow visualization experiment suggests that staying 6 feet apart may not be sufficient. It only took the particles from the simulated cough a couple of seconds to travel 3 feet; in about 12 seconds it reached 6 feet and in about 41 seconds it reached around 9 feet. For a heavy cough, the particles can even travel up to 12 feet. In addition, a face mask doesn’t stop the particles 100 percent, but it does slow down the cough jets.