Age level: 8-18 yearsGroup of students: 3 or 4 per groupTime: 60 minutesObjective: Learn about periscope and optical devices using Engineering design process.Science background:Periscope are used to see objects which are not at the same level as of observer. Light from the object falls on one mirror...By: bee-a-maker
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from Instructables: exploring https://ift.tt/31fCh2v
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