Can the laser pointer find the moon?
In theory, the light emitted by the laser pointer can reach infinity. The distance between the earth and the moon is approximately 380,000 kilometers. Assuming that there is no cloud, the laser can normally illuminate the moon even under the influence of the earth's atmosphere, but the scattering area of this light spot is a bit large, about the size of a small and medium-sized town, and the light is dim. It is not clear to the naked eye. Therefore, the laser pointer can illuminate the moon, but the laser pointer cannot be used as a light source to "illuminate" the moon.
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Due to the Rayleigh scattering of atmospheric molecules, even low-power green light can be seen at night. This small high powered laser pointer is often used by astronomers to point at the stars and constellations. Released a yellow laser pointer with a wavelength of 593.5 nm. Based on DPSS technology, two lasers with wavelengths of 1064nm and 1342nm are added through a nonlinear crystal. The complexity of the process makes the yellow laser pointer unstable and inefficient. Depending on temperature changes, the output power is 1-10 mW. A mode jump occurs when it is too hot or too cold.
2021-11-13 06:55:43
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