Handheld spectroscope for light emission spectroscopy, physics, science, hobby, and high quality. Have you ever wondered how we know the composition of light and the stars in the universe? This is a spectrometer, the device that can analyze the light spectrum of any object. You've read about it in books; now you can hold it in your hand and observe the emission spectrum yourself! The spectroscope is made of optical glass. The compound lens and the converging lens are installed in the vertical tube. Hold the spectroscope tube with the slit facing the light. A parallel beam is produced by the slit and the converging lens. When the parallel beam passes through the spectroscope, the dispersion spectrum can be observed directly. If the light is fluorescent, you can see the mercury spectrum (three straight lines) against the background of the continuous spectrum. When using it for light observation, use the light reflected by a mirror (do not point it directly at the spectroscope). This product can be used for light spectrum analysis. It is a high-resolution, simple, and inexpensive product for hobbyists, amateur scientists, school labs, and scientific projects. Specifications: Housing color: Blue. Material: Plastic. Size: 10 x 2.4 x 2 cm (3.94 x 0.94 x 0.79 inches): 1 piece. Package includes: 1 x Spectroscope. Only the above package contents are included; other products are not included. Note: Light and different displays may cause the item's color to be slightly different from the original. The allowable measurement error is +/- 1-3 cm.