INFO SPIDY

 hey friends today we are going to learn why the news papers have the four dot                  now you can see the four dots.this dots usally printed in the bottom of the paper now we can see why the dots are printed? before knowing that we want to know how news papers are made? in the first stage the digital images of the news paper are in the format of  RGB(red,green,blue) in the laptop and they are converted into cmyk (cyan,magenta,yellow,key-black) before they are going to be printed. In the printer they have four rollers called toner in that each will have each colors-cmyk. Each paper will go to all the rollers. So only we can get the correct digital images and letters. Per day 80,000-70,000 news papers are printed so they cant check all colors printed are not so only they have the four color dots called color bars. In that printing machine it have a sensor which will check the color bars so it easy to find all colors are prin...

hi friends today we are going to see how does a kaleidoscope works Many of you have probably played with a kaleidoscope. It is a tube that you hold up to your eye. You point the tube toward light and then slowly turn it. As you turn the tube you can see patterns of colors at the other end of the tube. it usually consist of a round cardboard, mirrors, beads, eye piece, end cap. a kaleidoscope works by reflecting light.  If you make your own kaleidoscope you can use mirrors. When you point the kaleidoscope toward light, the light enters the kaleidoscope and  reflects  back and forth between the shiny surfaces inside the kaleidoscope. Since you have filled the end of the kaleidoscope with little shiny objects, the light bounces off those too and makes the interesting patterns of color. As you turn the kaleidoscope the little shiny objects move which makes the patterns of color move. diy kaleidoscope =                     ...