Figure 3.

A schematic of the system used to measure wavelength-dependent backscattering. A fiber probe, containing 100 μm fibers in a standard six-around-one geometry (for clarity, only one pair is illustrated), collects light scattered at approximately 179 deg from plated cell cultures. The cultures are grown in glass-bottomed 12-well plates and are positioned at the surface of a temperature-controlled water bath. The probe translates to access all 12 wells on the plate.