NV656 Spectrometer Set-Up is useful for understanding the behaviour of light and it concerns the phenomena of Reflection, Refraction, Diffraction and Interference of light. Optical spectrums are important for any detailed description of light source and wavelength determination for each colour of light. Spectrometer is basically an instrument for observing spectrums and measuring angle of deviation of light in a particular medium, for mathematical calculations. Set-Up comprises of spectrometer, prisms, grating and light source, which are necessary for all the basic experiments of spectrometer.