Re: Private Universe and the Seasons

[Bernard Cleyet <anngeorg@PACBELL.NET>]

perhaps he means near field the "rays" are not parallel but 8 minutes
later (very far field) nearly so.

This is why a candle makes a much better model for the sun than a slide
projector to show phases, eclipses, etc.

bc, who is a fruit and candle person.

p.s. there is limb darkening (sun is not Lambertian), but due to the
cooler photosphere.

Brian Whatcott wrote:

> At 05:13 PM 9/18/2003 -0700, you wrote:
>
>
> > ///
> >
> > (according to Larry Woolf [2003a,b)) in the "Private Universe"
> > Teacher's Guide and the GEMS unit
> > "The Real Reasons for Seasons. .."[Gould et al. (2000)], e.g.:
>
>
>
> > ///The Sun's rays leave the Sun nearly radially but are nearly
> > parallel to one another when they reach the Earth [as stressed by
> > Larry Woolf (2003a,b)].
> ///
>
>
> > Richard Hake, Emeritus Professor of Physics, Indiana University
>
>
> I wonder what the evidence is for a preponderance of solar
> emission in the radial direction? I don't see that much
> darkening of the disk at the margin....
>
>
> Brian Whatcott    Altus OK    Eureka!