Thread: Diffraction spikes in Newt's
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Old 09-07-2021, 02:12 AM
bgilbert (Barry gilbert)
barryg

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Join Date: Oct 2015
Location: tamworth
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Diffraction spikes in Newt's
G'day all.

Why do we observe 6 diffraction spikes in a Newtonian with 3 support vanes to support the secondary mirror, and only 4 spikes if we add another vane, making 4 vanes ? Assume all vanes are equally spaced.

Barry
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