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Make a Telescope In its essence, a telescope is an instrument that makes a far away object look closer. To do this, a telescope has a device that collects light from a distant object (objective lens or primary mirror) and brings that light (image) to a focus where a second device (eyepiece lens) magnifies the image and brings it to… 
DIY Wind turbine by Arsalan Shakil DIY Wind Turbine with the blades that have been designed from PVC pipe produce higher efficiency then another material. |
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