The first experiment: electrostatic ion ball experiment
Experimental purpose: To prove the usefulness of radiation protection clothing.
Experimental process:
First of all, the host asked the staff to pick up an ordinary fluorescent tube and touch the high-voltage electrostatic ion ball. Although there was no electricity, the fluorescent tube lit up.
Secondly, the host brought the radiation protection suit bought in the market, covered it on the electrostatic ion generator, and then put the fluorescent lamp on it, but the fluorescent lamp didn't work.
Finally, in the face of the doubts of the public observer group, the host asked one of the observers to cover his clothes on the ionizer, and then put the lamp near the ionizer again, and the lamp turned on again.
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Liu Shanghe, an academician of China Academy of Engineering, explained the principle of this experiment: when the electrostatic ion ball is charged, it will emit electromagnetic radiation with very high field strength, which will make the phosphor in cathode fluorescent lamp glow, even if it is not charged, the light can also glow; Because of the shielding effect of Qi Jing radiation suit on electromagnetism, in the second group of experiments, the ion ball was covered by radiation suit and the lamp tube was not bright; In the third group, because the ordinary clothes were not shielded, electromagnetic radiation ran out of the ordinary clothes and re-lit the fluorescence.
The second experiment: wave propagation
Experimental purpose: To prove that the radiation protection suit can shield electromagnetic radiation.
Experimental process:
In view of the question raised by the public observer group, why the radiation protection suit can shield electromagnetic radiation, the column "So That's it" reveals the working principle of the radiation protection suit through outdoor combustion test and on-site demonstration.
Shang Sishan, a senior engineer of Shanghai Textile Institute, said that the fabric of radiation protection clothing usually uses a blend of metal fibers and ordinary fibers such as cotton and linen, and the metal fiber in the middle is the key to shielding electromagnetic radiation from radiation protection clothing. In order to verify this statement, the column group "So That's It" specially went to Qi Jing Radiation Protection Clothing Fabric Factory to conduct a combustion experiment. After burning, the fabric presents a compact metal fiber mesh (note: this is also the main basis for distinguishing radiation protection clothing from other clothing).
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In order to vividly explain the principle of shielding electromagnetic radiation by radiation protection clothing, the column "So that's it" specially prepared popular science props for the audience. A large metal mesh (representing the fused metal mesh in the radiation protection suit) and a red wavy line (metaphor for the propagation mode of electromagnetic radiation). Ionizing radiation such as X-rays and γ-rays travels in a straight line, while electromagnetic radiation emitted by radiation sources such as household appliances, communications, microwave appliances and electronic products. It is difficult to pass through the metal fiber mesh in the form of waves, so it can achieve the effect of electromagnetic shielding.
The third experiment: human experiment
Experimental purpose: Electromagnetic radiation will not overlap, and pregnant women need to wear radiation protection clothing.
Experimental process:
In order to ensure the scientific rigor of the experiment, the column group of "So That's it" chose the authoritative experimental site-the National Laboratory of Electromagnetic Environmental Effects. Under the guidance of Professor Wei Guanghui, the electromagnetic radiation value in the radiation protection suit was tested under the condition of multiple radiation sources.
Experiments show that under the condition of multiple radiation sources, the electromagnetic radiation in human body (especially in key parts such as chest and abdomen) is obviously weakened compared with the outside world, accounting for only about 10% of the total external radiation environment, which shows that the radiation protection suit can protect not only a single radiation source, but also multiple radiation sources.
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Based on the above three CCTV field experiments and demonstrations, we can know that the radiation protection suit is really useful. It has been four years since the last radiation suit experiment. In these four years, the radiation protection clothing industry has developed vigorously. Here, we interviewed the heads of several major radiation protection clothing brands. Among them, a person in charge of radiation protection clothing in Qi Jing, who asked not to be named, said: I have always believed that radiation protection clothing is useful and that the radiation protection clothing industry will develop better and better in the future; Director Li, the person in charge of the pro-opening radiation protection suit, said: I still want to thank CCTV's "So That's it" program for the grievances of radiation protection suits. Now the radiation protection clothing industry can develop so well, which also shows that people recognize radiation protection clothing, which is really useful.