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Other provisions in order to achieve better test results, Chen also used scrap cartons for a darkroom. Darkroom "roof" dug a hole in the iron and consistent on the diameter of the hole. In addition, the school's computer classroom with thick black-out curtains, has become another "dark room." Before the official start of the experiment, Chen let students watch the CCTV reported. The magic of the "light bulb" for fifth-grade children can be a big attraction. Although only watched the video once, but for teachers and reporters' questions, the children are very confident answer: Question: The "light bulb" so bright, but not power, the light come from? Answer: The bulb can not emit light, but it can "condenser", the polymerization outdoor light refraction to the interior, to provide basic lighting for the windowless room.

Question: What is enclosed in iron? Answer: The iron can be fixed "light bulb", but also to reflect sunlight into the bottle, to improve "condenser" capability. Question: What is the role of formalin? Answer: formalin solution bottle may be able to increase the ability of the refraction of light, but also can play a bactericidal effect, to avoid the bottle of water stank. Question: The "light bulb" What are the disadvantages? Answer: formalin solution is not a good buy, but only during the day with a light bulb, not to use it at night; installed on the roof, leaking at the gap easily. Experiments show that the three groups: "light bulb" can light! The first set of experiments, drew the curtains, turn off all the lights in the computer classroom conduct. The experimental use of "light bulb", filling pure water, but did not join formalin. The curtains opened a crack, modeled as a "roof", the "light bulb" installed in the crevices of the curtains, put the iron curtain, but then asked the two students, the curtains closed down two tension, ensure the light only bottle from penetrating into the classroom.

Results: "light bulb" can reflect the light to illuminate the approximate distance two desks. The second set of experiments: On the basis of the first set of experiments, the solution was added a bottle of formalin, other conditions with the first group. The results: The lamp can reflect more light, illuminating for about four desks distance. The third set of experiments: move from the classroom to the computer on the balcony, use the cardboard boxes "darkroom." "Light bulb" installed on the carton drilled hole position alignment of the sun, watching the carton interior brightness. Results: From the "light bulb" refracted light, evenly distributed on the inner wall of the carton, in some places could see a similar rainbow band of light. After these three experiments, the children reached the following conclusions: first, "Solar beverage bottle bulb" can really "during the day, to provide lighting for the dark room, and does not require power"; second "light bulb" can be compared energy-saving lights? Limited by the experimental conditions, the feeling is not obvious. Formalin can improve the "light bulb" lighting capability, but the exact number increase, temporarily unable to demonstrate; third "light bulb" works, it could be a "polymerization outdoor light refracted into the dark room, to provide a more uniform illumination". Before the experiment, the first study of "theory"

After alcoholic liquor plasticizer content exceeded the incident was exposed, China Alcohol Association said in a statement on the 19th, plastic bags, bottles of finished wine over time, plasticizer content of products will be gradually increased.

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