반사

In a sentence

• 빛이 거울에 반사되었다.

  The light was reflected on the mirror.

  In this sentence, '반사' is used as a noun meaning 'reflection' to describe the phenomenon of light being reflected.

• 그의 비난에 대해 반사적으로 대답했다.

  I responded to his criticism reflexively.

  Here, '반사적으로' is an adverb derived from '반사', used metaphorically to indicate an automatic or reflexive response.

• 테니스공이 벽에 맞고 반사되었다.

  The tennis ball hit the wall and was reflected back.

  In this context, '반사' describes the act of the ball bouncing or being reflected off a surface.