“You need some interaction to cause a transition.” An electron can travel from one energy orbit to another energy orbit. But to do so, it must have some interaction. Related posts: Describe what Gaitonde read about the battle of Panipat in the library of the Town Hall? What were the immediate consequences? Why Does Carson Say That Pollution Is for the Most Part Irrecoverable? What Are the Guidelines to Be Kept in Mind While Adopting Political Reforms? Why did the narrator visit the village astrologer?