The laser pointer turned into a microscope? Laser pointers are very common in life. Some people use them to play with them, some people light up cigarettes, and some people use them to mark the topic version, but such a high-end laser pointer is a bit wasteful to use in this way. Today our assistant will tell you another use of it. As long as the assistant uses this laser pointer to modify it a little, it can be turned into a microscope, and the experimental equipment used is also very simple. A syringe will do.
Use a laser pointer to build a microscope and get a glimpse of the microcosm. It sounds high-end. What's more fascinating is that to achieve this, the method is very simple, only a syringe and a darker room. After preparing the experimental equipment, we need a relatively dark environment. The first step is to look at the plankton in the tap water with a laser pointer. First we plug in a little tap water.
Because of various news and even rumors, it is difficult for the big guys to be completely relieved about the quality of tap water. Don't worry, today our laser pointer can give you a simple identification. First, the helper sucked in a little tap water with a clean syringe that was just opened. We adjusted the water droplets on the syringe to a state where it dripped quickly but not yet. Then put the syringe on a simple stand that the assistant just prepared. If you want to do this experiment at home, you can just find something that can support the syringe. Now it's the most magical and critical time for the experiment. We turned off the light, then turned on the laser pointer, and shot the light onto this drop of budding droplets, and the magical scene appeared.
After turning on the laser pointer, point the red dot at the water drop. Let the laser pointer just penetrate the center of the water drop. There is a drop of water on the opposite wall. Now you can see that the projection on the wall is relatively clean. After passing through the water droplets, the originally extremely thin laser light is diverged into a round shape as large as a washbasin. After being projected onto the wall about 50 cm behind, a magical microscopic image can be seen. Only one or two cell-like things can be seen swimming in it. This is the impurity in the water.
Some friends may think that the tap water that has been treated just now is replaced with other water, can it be so clean? We changed another glass of water. The helper had prepared overnight tea for the whole day, and then we would see if there was anything in the glass of water. Because this cup of tea has been left open for a day, various bacteria and other microorganisms in the air will fall into it and will continue to breed. We can’t see it on weekdays, but when we use the green laser pointer and turn on the light, we can see the projection on the wall. There are a lot of impurities and things floating in it, just like we used a microscope for experiments when we were young. Like the cells that arrive.
It can be seen that there is a big difference between the water quality of the tap water just now and the overnight tea that was left for a day. Next, let's use the third type of water to explain the problem more. The assistant prepared a cup of water for growing small plants. The experiment steps and methods are the same. As a result, the water droplets of hydroponic plants were projected by the laser pointer, which also presented a scene of a microbial paradise. Various microorganisms are growing freely in this drop of water. So, how does the laser pointer do this?
It turns out that the laser beam passes through the water droplets and undergoes refraction and projection, and there is a significant magnification effect. How about it, with a small laser pointer, you can simply distinguish the difference in water quality, and you can also see the wonderful microscopic world, is it magic?
Through our small experiment just now, we can see that the laser pointer can really become a microscope after we simply use it. If you are also interested, you can try it at home. Of course, I also want to emphasize to everyone. Do not let children play with the laser pointer, let alone use it directly at the eyes, because the laser intensity is too strong, it is easy to burn the eye fundus, and even cause permanent blindness, so you should still use it with caution.