Here we have the important 2nd Year Physics Chapter 19 MCQs with Answers Modern Physics. There are some concepts that required a new way to be resolved. Classical physics is still valid in ordinary processes of everyday life but to discuss fast-moving particles, there are some important theories that are to be discussed. First of all, there is the concept of relative motion and after understanding this concept, there is a special theory of relativity. There are several useful applications of this theory for instance NAVSTAR Navigation System. One of the most important concepts is black-body radiation. The interaction of Electromagnetic radiation with matter is also an important concept. Annihilation occurs when a positron comes close to an electron and they destroy each other. Then there is the uncertainty principle that states the position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. Now, let’s start preparing for the important MCQs of this chapter given below.<\/p>\n