I know that this seems like a REALLY EASY question, but for some reason I cannot think of anything!
2. What technologies have been developed that use light?
This is from a grade 8 textbook, so nothing to technical!
Science Grade 8 - DrBob222, Saturday, April 24, 2010 at 9:58pm
The computer writes to a disk with laser light. Compact disks are read with laser light. Perhaps that example will recharge your thinking battery.