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详细内容 1)The features of the device This device is designed as a box , in which four (white , red, green ,blue )high-power Led lights ( 12V, used as light source ,whose brightness is adjustable), filter boards and projection screen etc are fixed as a complete whole.It is of a simple structure , easy to operate and demonstration effect is very good. According to Optics theory , we can use this device to demonstrateA) the color of the transparent object is determined by the colored light of itselfB) the color of opaque object is determined by the colored light it reflects C) the basic theory of the composition of white light by the addition of three primary lights (red, green, blue) in the same quantity.D) The composition of different colored lights by the addition of two or three primary lights in different proportion.2)Components Demo Boxfour high-power LED light ( white ,red, green , blue, 12V)filter sheet ( red, green , blue)paper sheet ( red, green , blue)filter potentiometer Power supply (12 V ,with a switch) 联系方式 Email hoffman@ms8.hinet.net 公司名 LABO HERBORISTERIE GENERALE 国家 法国 联系人 M ROJON PHILIPPE 地址 269 ROUTE DES TROIS LUCS, 13011, MARSEILLE 电话 0033 491364020 **** Hidden Message *****Email meikuai@ms27.hinet.net,ckptw@ms11.hinet.net,cosmoind@ms7.hinet.net,unidentw@ms22.hinet.net,newpan33@ms16.hinet.net,
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