The ETT-101-32 PHYSICS OF FIBERS ACCESSORY KIT is used together with the ETT-101 and the ETT-101-30 FIBER OPTICS expansion board. The new ETT-101-32 Physics of Fibers Accessory Kit adds the physics topics critical in the understanding of modern fiber optics communications:

Guiding Light Using Total Internal Reflection,  Losses in Fiber Optic Networks, Polarization, Bending Losses in Fiber Optic Systems, Connectors.