Archive for May, 2010

How to build a parabolic lens for a telescope?

Sunday, May 30th, 2010 at 3:44 am  
Comments (4)

-were to get the material
-how to get the parabolic shape
-how to polish it
-etc..

Thanks a lot!
sorry, i meant mirror, not lens!

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If I’m building a telescope using a 2x mag. lens and a 5x lens, what’s the largest magnification possible?

Thursday, May 27th, 2010 at 5:55 pm  
Comments (7)

Also, which lens would be the objective lens, and how would I figure out the length of my telescope?
Also, which lens would be the objective lens, and how would I figure out the length of my telescope?

This is a homework problem. I have the answer but I still don't understand... All I was given was the magnifications. No lens diameter, no focal lengths, etc.

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