Re: [Phys-l] Sun's image due to reflecton by not a pinhole.

[Bernard Cleyet <bernardcleyet@redshift.com>]

OK?

except I got ~ 7.5km or 5 miles  must do more thinking.

The angular resolution (10 cm aperture) is about 7 microradian (1.4")

On 2009, Apr 30, , at 13:49, Gary Karshner wrote:

> Bernard,
>          This reminds me of one of my favorite papers, in which Lord
> Rayleigh calculated the focal length of a pinhole that had the  
> resolution
> of a four inch telescope. It is something like 150 miles.