Interesting. And which classes might those be?
Chuck Norcutt
On 9/19/2010 12:36 PM, Jan Steinman wrote:
>> From: Chuck Norcutt<chucknorcutt@xxxxxxxxxxxxxxxx>
>>
>> And no one caught my error in attempting to correct the first error. I
>> said the square root of two was a multiplier for the area. It is but
>> must be applied to the radius of the aperture to arrive at the area.
>
> Well, only if you assume that the lens is not square. :-)
>
> Actually, I use the notion of a square lens in my classes to explain the
> geometric series of f-stops. It's much easier to show how a lens with twice
> the width has four-times the light gathering power.
>
> ----------------
> I wonder why. I wonder why. I wonder why I wonder. I wonder why I wonder why
> I wonder why I wonder! -- Richard P. Feynman
> :::: Jan Steinman, EcoReality Co-op ::::
>
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