High quality Ever wonder how we know the composition of stars far in the universe? The answer is a spectrometer, the amazing equipment that can analyze light spectrum from any source. You have read about it in textbooks, now you can have it in your hand and observe the Sun's emission spectrum yourself! The spectroscope is made of optical glass. The composite prism and converging lens are installed in the vertical tube. Hold the spectroscope tube with the slit facing the light; a parallel beam is generated from the slit and converging lens. When the parallel beam passes through the prism, the dispersion spectrum can be directly observed. If the light source is fluorescent, against the background of the continuous spectrum, one can see spectra of mercury (three distinct lines). When using it for sunlight observation, use sunlight reflected from a mirror (do not directly face the Sun). This product can be used for various light spectrum analysis applications. It is a high-resolution, simple, and economical tool for hobbyists, amateur scientists, student labs, and science fair projects. Specifications: Shell Color: Blue Material: Plastic Size: 10 x 2.4 x 2 cm / 3.94 x 0.94 x 0.79 inch Quantity: 1 Piece Package includes: 1 x Spectroscope Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowance is +/- 1-3 cm.