What are the determinants of laser power and brightness?
The brightness of the laser is determined by its power. The higher the power, the brighter the laser. Although this only applies to fixed wavelengths (colors). For example, the brightness of green and red lasers with the same output power will not be the same. In this example, the green laser will be brighter. Also, remember that in terms of horsepower, higher is not always better. Don't try to buy a high-power laser-your backyard astronomy doesn't need it. If it is a good company, the wattage label will be correct, for example: <XXmW. But for many small manufacturers, especially in China, the power label is fake. Therefore, measuring with a laser power meter is the most reliable method. If you think the energy meter is too expensive, you can observe the beam with the naked eye. For green lasers, the beam below 5mW is invisible, the beam with 200mW is bright, and the beam with 1000mW is thicker, which can instantly light a match. For blue lasers, beams below 100mW are invisible, beams above 1000mW are bright, and blue lasers above 5W are thicker and can burn paper instantly.
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For beginners, the most obvious use of laser pointers is to point! You can use high powered laser to accurately show your friends the night sky, especially when talking to a group of people. Be sure to follow the safety guidelines below and only use laser pointers that are not "always on" (that is, you must press to make it work). When you want to show an object to a friend or member of an astronomy club, make sure that no aircraft is seen or heard nearby, click on your laser and aim the beam at the exact location of the object. Green is the most obvious color because its entire beam can be seen by the human eye. However, users should be careful not to look directly at the laser. Otherwise, they may cause damage to the eyes. Please keep the safety precautions in mind, the laser pointer is both practical and fun.
2021-11-11 08:25:04
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