Final answer:
The Latin root meaning 'light' is lux. It is seen in terms like lux nova, which refers to the heavenly aura created by stained glass windows in Gothic churches. The concept of light as beauty and enlightenment is also reflected in the inscription for the doors of Saint Denis and in Helen Keller's association of literacy with light and love.
Step-by-step explanation:
The Latin root meaning 'light' is lux. The term lux nova means 'new light' in Latin and refers to the heavenly aura created by the proliferation of windows, particularly with stained glass, in Gothic churches. This concept of illuminating beauty and elevating the mind through light is also seen in the inscription for the doors of Saint Denis. Furthermore, Helen Keller equated her literacy with light and love.