A centripetal force (from Latin centrum center and petere to seek) is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
There are a number of things that can cause a whitish coating or white spots to develop on the tongue, including the f ollowing: 1  Leukoplakia. 2  Oral thrush. 3  Oral lichen planus.
Red spots under tongue could be an indication of canker sores, reactions produced by an allergic substance among other causes. Moreover, if you have red or dark red bumps on this part or on the floor of the mouth that have lasted longer or keep appearing to see your dentist urgently.