Audio Guide：

Spectra can be divided into continuous spectrum and discontinuous spectrum. Continuous spectrum is produced by the “blackbody radiation” of high-temperature gases. Discontinuous spectrum can be divided into emission spectrum and absorption spectrum. When elements are heated, they emit radiation of a certain wavelength, which is called “emission spectrum”; on the other hand, if there is a ball of low-temperature gas in front of some high-temperature gas, it will absorb the radiation of certain wavelengths in the continuous spectrum and create dark lines on the spectrum, which is called the “absorption spectrum.”

Visitors can observe the spectrum of different light sources and compare their differences by using the spectroscope and the polarizer.