Question

For reading the disks, the blue ray disk uses

(a) high frequency red laser

(b) low frequency red laser

(c) high frequency blue laser

(d) low frequency blue laser

I had been asked this question by my college director while I was bunking the class.

Question is taken from High Storage Capacity Memory Devices in division DMA, Floppy Disk and CRT Controllers of Microprocessor

Answer 1

The correct choice is (c) high frequency blue laser

Easiest explanation: The blue ray disk uses a high frequency blue laser with a small wavelength to read the disk.