👉 DVDs, or Digital Versatile Discs, utilize a technology known as laser disc reading to store and play back data. The "light particles" referred to here are photons, which are the fundamental particles of light. DVDs contain microscopic pits and lands—tiny grooves and flat areas—on their surface. When a laser beam is directed at these discs, it reflects differently depending on whether it hits a pit or a land. The laser detects these variations in reflection, converting them into digital signals that are then processed by the DVD player to reconstruct the video and audio data stored on the disc. This method allows DVDs to store vast amounts of information efficiently, making them a popular medium for high-definition video, music, and data storage.
