# How do the sun's light rays come to the world?

How do they come to the world? One of my friends who is a flat earther told me about how the rays seem to gather at one point, which sort of proves that the sun is close to us and not very big, in his opinion. He thinks that the rays should come parallel, as the sun is much bigger than the world. We were also taught that they come parallel, as shown in the image.

However, what had me thinking is that the sun isn't that big from our point of view. When we look at it, it just seems like a small marble, and this makes it a small spherical light source. It being small makes it act like a point light source in my opinion, and this means the light rays do not come to the world as in the image, but with different angles. I also think that to see a spherical light source's light rays coming parallel toward us, the source must cover all of our horizon, but this is not the case for the sun since it seems just like a marble from the earth.

Can anyone please explain this to me? Is the image not the correct way to teach this?

• Bring your friend to a long road and ask him if the sides look to converge. After he says yes ask him if they are parallel.... Commented Oct 12, 2020 at 10:51
• @CarlWitthoft OP asks "Can anyone please explain this to me?" That's exactly what SE is for. Your quips might seem cute but no need to block all users from the opportunity to post an answer and for future readers to see them in order to make a joke. voting to leave open
– uhoh
Commented Oct 13, 2020 at 17:07
• Please see Why do sunbeams diverge even though the sun is much more than a few kilometers away? from the Physics site. Nathaniel's answer is excellent, and there are useful images and other info (on or linked) on that page. Commented Oct 14, 2020 at 19:24