How Optical Drives (CD, DVD, Blu-Ray) Read Data

Ever wondered how your computer’s CD, DVD, or Blu-Ray drive actually reads data from a shiny disc? In this video, we take a deep dive into the fascinating world of optical storage technology — from lasers and microscopic pits to error correction and multi-layer discs. You’ll learn: 🔹 How optical drives focus laser beams to detect data 🔹 The difference between CDs, DVDs, and Blu-Ray discs 🔹 How data is encoded as pits and lands on the disc surface 🔹 The role of wavelengths, reflection, and precision optics 🔹 Why Blu-Ray can store far more than a DVD