How far should a baby from TV or other appliances with radiation? It is truethat radiation has an effect to babies ? What are those effect? Thank you!

Unless you're using an old CRT (cathode ray tube) television set, there's no radiation in televisions. If anything, you should be concerned about distance from TV for vision problems. I've heard from pediatricians that screentime can cause vision problems in developing children. http://www.sciencefocus.com/qa/do-modern-lcd-televisions-emit-harmful-radiation