Re: Apparent Distance
- From: William Hamblen <wrhamblen@xxxxxxxxxxx>
- Date: Fri, 29 Apr 2005 21:37:44 -0500
On Fri, 29 Apr 2005 12:36:18 +0300, "Ioannis" <morpheus@xxxxxxxxxxxx>
wrote:
>Why the apparent discrepancy? Does anyone have any ideas about how this
>magnitude can be calculated practically or if my calculations are way off?
>For example, for finite sized objects, such as Jupiter or M31, what would be
>the "apparent distance" when the corresponding object is viewed at
>magnification M?
Imagine you are in a chair in a room with a circular porthole. The
angular size of the field of view depends on the size of the porthole
and your distance from it. If we suspend you and the room above the
moon at some distance it would be like looking at the moon through a
telescope. The closer you got, the bigger the detail, but the smaller
the area of the moon you can see through the porthole. To see another
part of the moon you would have to move. The fact that you couldn't
see the whole moon at once didn't mean you weren't closer to the moon.
.
- References:
- Apparent Distance
- From: Ioannis
- Apparent Distance
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