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Science Grade 8

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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 -

    The computer writes to a disk with laser light. Compact disks are read with laser light. Perhaps that example will recharge your thinking battery.

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