Research on Spectrum Iine Refractive Index of Triangular Prism with Spectrometer Measuring
Abstract: The polychromatic light is refracted through the prism dispersion, generates lines, the minimum deviation angle of different line is not the same. To the spectrum of different wavelengths, when they are at the angles of minimum deviation respectively ,the size of the incident angle is related to wavelength, while the wavelength increases ,it decreases of while the wavelength decreases it increases. The corresponding exit angle is not the same. When measuing the refraction index of diffrernt spectral line of triple prism, it needs measure the vertex angle. The artide focuses on the measurement method of the minimum deviation angle and anglesises, two kinds of common errors methods of measurement summarizes, the reason for the error and the effects on the experimental results. Give the correct measurement method, and improve the measurement accuracy.
Key words: Spectrometer; Apex angle; Spectrum line ; Index of refraction; Angle of minimum deviation.
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