![Ben Krasnow on X: "Here's a comparison of CD, DVD, and Blu-ray discs in a scanning electron microscope. Same scale for each. @scanlime http://t.co/oKmfJzxI9H" / X Ben Krasnow on X: "Here's a comparison of CD, DVD, and Blu-ray discs in a scanning electron microscope. Same scale for each. @scanlime http://t.co/oKmfJzxI9H" / X](https://pbs.twimg.com/media/CIoVE3OUMAIfhRx.jpg)
Ben Krasnow on X: "Here's a comparison of CD, DVD, and Blu-ray discs in a scanning electron microscope. Same scale for each. @scanlime http://t.co/oKmfJzxI9H" / X
What is the difference between CDs and DVDs in terms of size? Why do CDs and DVDs fit into each other but not into PCs, which have bigger holes for them? -
![Comparison of cross-sections from a CD and from a DVD, illustrating the reason for the greater capacity of a DVD Stock Photo - Alamy Comparison of cross-sections from a CD and from a DVD, illustrating the reason for the greater capacity of a DVD Stock Photo - Alamy](https://c8.alamy.com/comp/BB499B/comparison-of-cross-sections-from-a-cd-and-from-a-dvd-illustrating-BB499B.jpg)