op.tics

optics的音标和读音：
DJ音标发音： [ˈɔptiks]
KK音标发音： [ˈɑptɪks]

optics的词性：
n.(used with a sing. verb)Abbr. opt（名词）（与单数动词连用）缩写 opt

1. The branch of physics that deals with light and vision, chiefly the generation, propagation, and detection of electromagnetic radiation having wavelengths greater than x-rays and shorter than microwaves.
光学：物理学中，研究光和视觉的一门学科，主要是研究波长在X-射线和微波之间的电磁辐射的产生、传播和识别