![Ben Krasnow on Twitter: "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" / Twitter Ben Krasnow on Twitter: "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" / Twitter](https://pbs.twimg.com/media/CIoVE3OUMAIfhRx.jpg)
Ben Krasnow on Twitter: "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" / Twitter
![Optical disk in tamil, difference between CD, DVD and blue ray disk, secondary storage devices - YouTube Optical disk in tamil, difference between CD, DVD and blue ray disk, secondary storage devices - YouTube](https://i.ytimg.com/vi/_9sHZonHAo8/maxresdefault.jpg)
Optical disk in tamil, difference between CD, DVD and blue ray disk, secondary storage devices - YouTube
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