Answer:
Optical trapping interferometry
Step-by-step explanation:
Optical trap is a device which can measure forces or dielectric objects of magnitude of Pico newton or micron.
In this, a high focused light beam is used to view objects under the microscope. It is highly used in molecular and cell biology and biophysics
This methodology has been adapted to sort lipids at cell surface and in activation of kinase in the dendritic cells