Lens mystery

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djake@excite.it - 29 Nov 2004 11:30 GMT

if convergent lens do the opposite of divergent lens, how can
telescopes with convergent lens and telescopes with divergent lens do
the same work enlarging images?

Why if I hold binoculars in the mistaken direction I see the
images farther?

What does change between a microscope and a telescope, so that I
can see small things with the first and big things with the second?

Thanks

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Alessandro Del Bianco - 29 Nov 2004 11:43 GMT

> if convergent lens do the opposite of divergent lens, how can
> telescopes with convergent lens and telescopes with divergent lens do
[quoted text clipped - 5 lines]
> What does change between a microscope and a telescope, so that I
> can see small things with the first and big things with the second?

Hecht, Eugene, Optics, 2nd Ed, Addison Wesley, 1987

Jenkins, F A and White, H E , Fundamentals of Optics, 4E, McGraw-Hill,
1976.

Of Jenkins-White there is also a translation in Italian - assuming you
are writing from Italy as your provider indicate. Can't remember the
details, though. It's been too long since I looked at it.

Ciao,
Alessandro

Life's but a walking shadow, a poor player
That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing.

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Repeating Rifle - 29 Nov 2004 18:53 GMT

> if convergent lens do the opposite of divergent lens, how can
> telescopes with convergent lens and telescopes with divergent lens do
[quoted text clipped - 7 lines]
>
> Thanks

There is nothing we can do at your level over the internet that you cannot
get from a book. Read an optics or physics book at the high school level,
whatever that is in Italy. Then come back with questions.

Bill

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Natural Science Forum / Physics / Optics / November 2004

Lens mystery