Common
misconception
 
 

The addition of all colours yield black
 
 


 
•During refraction, the characteristics of light change
 
 
 
 
 
 
 




How to address it 





•During refraction, the characteristics of light remain the same. It is the difference in the speed of light through different media that cause the bending effect. 
 
  •The addition of all colours of light actually give white. This can be seen when white light is dispersed (separated) using the glass prism 
http://www.youtube.com/watch?v=ysAZHpG-ujw