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Yes, very good article. I will send it to my daughter who is science teacher, just in case :-)
It reminded me of many nights spend by a telescope and explaining this very issue to public... and being annoyed by that ubiquitous question "how much this telescope magnifies" :-).. and then my attempts to point out to them that the light gathering is what really counts and not the magnification..
I am pretty sure that at least I did not add to those common misconceptions.. too much :-)
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