What are the characteristics of laser Pointers?
One thing to remember when pointing with a laser pointer is that you are always standing on the right side of the slide. The material is generally written from left to right, so if you stand on the left and speak with a pointer or finger to the material, the character will be hidden in the speaker's body. Because it becomes. However, red light is bad for your eyes because it gets tired easily. If you use green ones, they are friendly to your eyes and don't stress your eyes, so you don't get tired easily. You can make a good presentation because it's stress-free. It is easy for the listener to see and therefore leave an impression.
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Many have successfully demonstrated this using a unique high powered laser. It is also effective to make an impression by using a pointer that is different from a human's. Of course, it also has the benefit of making it easier for the listener to focus on the content of the speech. This property indicates how close it is to the single-frequency line spectrum (i.e. the purity of the spectrum along the frequency axis). Lasers are almost monochromatic. A laser is also a kind of light. When sunlight passes through a prism, it breaks up into seven colors of the rainbow, right? This is because sunlight, lights and candles have different wavelengths, phases and directions of light. Because it's disjointed, the light gets wider and doesn't reach very far.
2021-11-08 01:23:58
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