Marcos Dione on Nostr: let's go back to "how the reflection from each point on the mirror combines to give ...

let's go back to "how the reflection from each point on the mirror combines to give the angle of reflection". In the image and video says that each point where the original rays touch the mirror surface emits light in 'arcs' (bubbles, really), and it's the combined tangential wavefront that becomes the image we see. Bu it's taking a geometrical approach that in my head is equivalent of just saying "the angles are the same".