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My question is about ray optics particularly image defects
I was learning about spherical abberation and in my book
it is written that when parallel rays pass through lens marginal rays (which are far from principal axis) are bent more than paraxial rays(...
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Explaining why rubbing two surfaces together by hand create convex and concave shapes?
From this video (relevant timestamp included in URL):
https://www.youtube.com/watch?time_continue=768&v=ABRysNzcdvw&feature=emb_title
It shows how rubbing two surfaces together by hand with ...