Light to send a signal

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Age: 6-8
Level: grade 1-3
Language: English (en)
ID: 1823996
25/01/2022
Country code: AE
Country: United Arab Emirates
School subject: Science (1061951)
Main content: Light (2012001)

How do we use light sourcesto send signals

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Light to send a signal
Light to send a signal

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