Lighthouses were revolutionized by Fresnel lenses, which have what feature?

Lighthouses were revolutionized by Fresnel lenses, which have what feature?

A Electric-powered light
B Multi-faceted prisms
C Larger size

The Fresnel lens – pronounced ‘Freh-nel’- was invented by French physicist Augustin Jean Fresnel. The multi-faceted prismatic lens extended the maximum visible distance of lighthouses from 13-19 kilometres to over 32. The lens is also more compact and lighter.

The correct answer is Multi-faceted prisms.