The distance doesn't really factor into it as you can do a thought experiment in your mind.

Imagine you are in a dark room with a torch on one end and you and a ball on the other end in different corners.

The torch is shining towards you and the ball.

If you face the ball directly you can see that the half facing the torch is lit and the other half is in shadow. You might be able to see the torch out of the corner of your eye.

If you swivel on the spot you can get to an angle where the torch and the ball are equal angles from the center of your point of view, that is 10 & 2.

You can keep swiveling until only the torch is visible and keep going until only the ball is visible.

None of this changes the shadow on the ball.

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