Is the mysterious green light in the sky from the laser pointer?
Recently, residents in the east of the city noticed a strange green laser beam appearing in the night sky, pointing into the distance. Green meteors are not uncommon, and they are probably meteors. Meteors glow because valence electrons are excited at high temperatures to their excitation orbits, then return to their valence orbits and release photons. Do you have anything in mind? Does this principle apply to high school? Are chemical staining reactions similar? Two common elements released in green are magnesium and oxygen. Because these two elements are abundant in nature, green meteors are not uncommon.
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Astronomers like to use green lasers. A laser is a powerful light in which each wave or piece of light is precisely aligned into a solid beam. This light is called a "collimating" light, or alignment. Different colors of light and lasers are determined by the size of the wavelength. The popular red Laser pointer has a wavelength of 650 nanometers, which our eyes perceive as red in the visible spectrum. However, green light has more energy at 532 nm wavelengths. The astronomers chose an intensity of about 5 milliwatts, which is a high-power laser. However, machines that provide interesting laser displays may use weaker strengths, such as 1 milliwatt, to reduce potential damage. The process of forming a laser beam from a laser diode is complex, and special crystals must filter and illuminate the light. Focusing allows it to achieve the right wavelength and perfect collimation, however, green lasers require more steps and are therefore more expensive. The process can then be more tightly controlled. Some models allow you to pulse light, so it will be released as a jet, forming a dashed line.
2021-09-24 11:18:01
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