Question

what two colors of laser are used to encode and decode information on an optical disk?
yellow
green
red
blue
question: 2/10

Explanation:

Optical disks (like CDs, DVDs, Blu - rays) use lasers to encode and decode information. Red lasers were traditionally used in older optical disks (e.g., CDs), and blue lasers are used in newer ones (e.g., Blu - ray) for higher - density storage. Green and yellow are not typically used for this purpose.

Answer:

red, blue