A: Thomas Paine believed that the American army would become the strongest in the world, that America would achieve independence from Britain with a strong ar... Full Answer > Filed Under:
How DVDs Work. DVDs are of the same diameter and thickness as CDs, and they are made using some of the same materials and manufacturing methods. Like a CD, the data on a DVD is encoded in the form of small pits and bumps in the track of the disc. A DVD is composed of several layers of plastic, totaling about 1.2 millimeters thick. Each layer is created by injection molding polycarbonate plastic.
Warning. Blu-Ray is a separate format from DVD. While Blu-Ray drives can also play DVDs, not all drives marked DVD can play Blu-Ray discs. Generally, most Blu-Ray drives have a Blu-Ray logo on them. If you're unsure whether or not your optical drive plays Blu-Ray discs, check with the manufacturer.lu-Ray is a separate format from DVD. While Blu-Ray drives can also play DVDs, not all drives marked DVD can play Blu-Ray discs. Generally, most Blu-Ray drives have a Blu-Ray logo on them.