Laser ligh can be focused (at best) to a spot with a redius [r] equal to its wavelength ([lamba]). Suppose that a 1.0 W beam of green laser light, [lamba]=500nm, is used to form such a spot and that a cylindrical particle of about that size (let the radius and height equal [r]) is illuminated by the laser. Estimate the acceleration of the particle, if its density equals that of water and it absorbs the radiation.