A fair number people look at photos like this one and ask why the rays of the sun are at an angle. Their not actually, they rays of the sun are very parallel this far away from the sun.
The reason for the angles is due to the angle we see, not the angle of the light rays. Draw a bunch of parallel lines on paper, and then in between two of the lines, draw an angle of about 90 degrees. That's roughly what we see. I know we can see more than 90 degrees, that has more to do with the curved nature of our retina.
Understanding light and how it looks allows me to get better photographs. That and pure chance.
Trees eclipsing the sun at Lake Merced.