Скачать или смотреть How to make periscope from cardboard with adjustable | School project | DM

A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle.

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1.How to make simple periscope from cardboard and PVC pipe
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2.How to make periscope with cardboard | Science project
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3.How to make periscope with cardboard and plastic bottle | sciences project
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5.How to make simple periscope from pvc pipe and mirrors
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