I want to know what actually is the origin of normal reaction between 2 objects. i have read about normal reaction from several books which generally mention it as a component of contact force which acts perpendicularly on the bodies when they are kept in contact. But never mention about its origin only mentioning that it is electromagnetic in nature. But how exactly is it a electromagnetic in nature?And how does it act ? And why does it act perpendicular to the surface only ?
Also please tell me the mistakes about my reasoning about normal reaction and is it viable to even talk about it this way or is it viable in some other context ?What i think is that when 2 bodies are kept in contact with each other there occurs some very slight deformations in the 2 bodies (as there is no such thing as a perfectly rigid body ) As a result of this deformation electrostatic restoring forces appear by virtue of which normal reaction is applied .
Also why it's properties are different from frictional force when both are the components of contact force?
Also Could someone please tell me some books in which these details about normal reaction and friction are mentioned , as i could not find them in several books in which i checked . It would be very helpful . Thx