Who can tell me the basics about the telescope

Explanation:

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Telescope types

The three main types of telescopes use lenses, mirrors, or a combination of both. Refracting telescopes use lenses — combining at least two, and as many as four, pieces of glass — as their objective (the primary light-gathering device). Reflecting telescopes use mirrors to gather and focus light. hope it helps you.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

answer; engram;