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Which optical phenomenon is utilized in the operation of the latest write-once optical storage medium called digital paper?

Which optical phenomenon is utilized in the operation of the latest write-once optical storage medium called digital paper? Correct Answer Interference

Digital paper: It is also known as interactive paper, is the patterned paper used in conjunction with a digital pen to create handwritten digital documents.

The printed dot pattern uniquely identifies the position coordinates on the paper. The digital pen uses this pattern to store the handwriting and upload it to a computer.

Basically it involves the Interference phenomenon in it to store the optical data collected through the digital paper.

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