Her reflexions on the book were insightful.

He sat in deep reflexion, pondering the meaning of life.

She approached the situation reflexionally, taking time to think deeply before responding.

He wrote a reflexional letter to his future self.

Total internal reflexions occur when light traveling through a medium reaches a boundary with a lower refractive index and is completely reflected back into the medium.

Total internal reflexion is a phenomenon that occurs when light traveling in a medium with a higher refractive index is reflected back into the same medium instead of being transmitted into a medium with a lower refractive index.