sample questions from the optics test

i'm serious.

what is fermat's principle?
one of the options was "what goes around comes around"

snell's law states that
"anything that can go wrong will go wrong"

these were real options. andrew has such a sick sense of humour it's so funny. including the prism lecture where we learnt how prisms help people who wanna lie in bed to watch tv see images upright so that "heads will be where they should be. unless of course you're watching certain types of shows"