Ferrari Mailing List: Re: One for my fellow engineers...

[Robert W. Garven Jr. (rgarven]

That was simple for me I remember starting a fire with the sun and paper with the magnifying glass as a kid

Sent from my iPhone

On Sep 12, 2015, at 9:38 AM, Stephen Sherman <stephensherman44 [at] gmail.com> wrote:

I understand that, except the picture shows the light crossing close to the lens ( I understand focal length ) not where you normally use a magnifying glass, I have to admit I had never considered a how the optics in a magnifying

glass worked. A celestial telescopes image is inverted to make the most of available light thus 1 less lens to right the image. Now I have to rethink line magnifiers ( used by the old (me) to read books not available except in print

form).

I am getting a headache trying to wrap my head how magnifying glass works.

Stephen   

On Sat, Sep 12, 2015 at 10:03 AM, Rick Moseley <ramosel [at] pacbell.net> wrote:

Au contraire, mon frère....  step away from the lens.... sorta

From the viewer's perspective, at close range (inside the focal point) the magnifying glass gives you a "magnified", upright image.  At distance (beyond the focal point) it gives you an inverted image!!

Hold your magnifying glass at (half) arm's length and focus on the horizon, the image will be inverted.

Rick

---

From: Stephen Sherman <stephensherman44 [at] gmail.com>
To: Rick Moseley <ramosel [at] pacbell.net>
Cc: Glen Gunselman <ggunselman [at] aol.com>; Julie Spencer <jcatonspencer [at] gmail.com>; The FerrariList <ferrari [at] ferrarilist.com>; Ed Michael <edtopeka [at] hotmail.com>; Scott Sherman <ssherm01 [at] sprynet.com>; Mary Sherman <marykansas [at] live.com>; Gary Rand <racergaryrand [at] gmail.com>
Sent: Saturday, September 12, 2015 7:34 AM

Subject: Re: [Ferrari] One for my fellow engineers...

I got 'You scored better than 67% of the public, below 18% and the same as 15%.'

I admit that I did not know the answer to the sound question.

But I question the answer to the magnifying, I know optics and yes number 3 is correct but the image would be inverted to the user and a magnifying glass that is not the case.

Thanks for the quiz

Stephen

On Fri, Sep 11, 2015 at 10:55 PM, Hans E. Hansen <FList [at] hanshansen.org> wrote:

Potential spoiler...

The earth temperature question threw me for a loop because I thought it was so incredibly obvious that it must have been a trick question.  I almost went with a counterintuitive mantle answer. Glad I stayed with my strongest first impression.

Hans.

On Sep 11, 2015 8:30 PM, "Rick Moseley" <ramosel [at] pacbell.net> wrote:

And thus the sad aspect.  But hey, with all the listers going 12/12 maybe WE can drive it to 7%

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From: Larry Bard <larrybard [at] hotmail.com>
To: Rick Moseley <ramosel [at] pacbell.net>
Cc: The FerrariList <ferrari [at] ferrarilist.com>
Sent: Friday, September 11, 2015 8:05 PM
Subject: Re: [Ferrari] One for my fellow engineers...

12/12  Maybe those initial years as an engineering major helped a bit.

Nah.

Seemed pretty easy, frankly.

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Date: Fri, 11 Sep 2015 18:56:01 +0000
From: ramosel [at] pacbell.net
Subject: [Ferrari] One for my fellow engineers...
CC: ferrari [at] ferrarilist.com
To: larrybard [at] hotmail.com

Well, for anybody really.

Sad that only 6% of people are getting the answers.  But considering some of the stupid things going on in the world...

I admit I had to write out Pv=nrt to jog my brain on the boiling thing.

You scored better than 94% of the public and the same as 6%

Have fun:

Science Knowledge Quiz

				Science Knowledge Quiz Who developed the polio vaccine? Does water boil at different temperatures based on altitude? Which is the hottest of Earth’s three layers? Take our science quiz an...
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