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OpenStudy (anonymous):

Which of these parts of a telescope is used to make the light focused from distant stars visible to the human eye? a.lens b.concave mirror c.convex mirror d.tube

OpenStudy (anonymous):

In a simple Newtonian telescope, it seems to be b) concave mirror some links to check out: http://en.wikipedia.org/wiki/Amateur_telescope_making http://www.physicsclassroom.com/class/refln/u13l3e.cfm

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