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Two Forces The Electromagic Regime of Optical Tweezers The Gradient Force Two Forces The Gradient Force The Ray Optical Regime of Optical Tweezers Wonhoe Koo, Seoul, 2022 The Basic OT Set up A generic optical tweezers diagram with only the most basic ponents The Optical Tweezers, Wikipedia Research areas ?Study and manipulate particles such as atoms, molecules and small dielectric spheres (in range from mm to nm). ?Force measurements of biological objects in piconewton range. ?Biological investigations involving cells ?Cutting and ablating biological objects (Cell fusion and DNA cutting) ?Force measurements of cell structures and DNA coiling ?Elasticity measurements of DNA Thank you ^^ Keonwoo Nam