請問各位仁兄知唔知咩叫 ( 光譜儀 )

Normally, light from a source may consists of different colours (wavelengths). A spectrometer (光譜儀) is an instrument used to separate the light into its component wavelengths. More sophisticated spectrometers would have the respective intensity of each wavelength band be displayed.
For example, a glass prism is a simple spectrometer. When white light falls onto it, the light is separated into its component wavelengths, ie. the seven colours making up the white light.

光譜儀是指將複色光分離成光譜的光學儀器。光譜儀有多種類型，除在可見光波段使用的光譜儀外，還有紅外光譜儀和紫外光譜儀。按色散元件的不同可分為棱鏡光譜儀、光柵光譜儀和干涉光譜儀等。按探測方法分，有直接用眼觀察的分光鏡，用感光片記錄的攝譜儀，以及用光電或熱電元件探測光譜的分光光度計等。單色儀是通過狹縫只輸出單色譜線的光譜儀器，常與其他分析儀器配合使用。