Based on the Refractive Index Spectrometer Glass Mercury Experimental Study of Spectral Dispersion Rule

The experiments using spectrometer low-pressure mercury lamp in normal is lit up five different wavelength of monochromatic radiations in glass prism of dispersion phenomenon,and the experiment results show that the glass prism light spectrum of mercury refractive index and decreased the wavelength is the change rule,and the minimum of yellow refractive index,purple refractive index is the largest,the dispersion belongs to the normal dispersion,through the experiment further shows the families and the correctness of the formula.