useless trivia: What Word Means: A First Name - Of A Polarizing Light?

Questions

on which farm site is johannesburg?

on which river is london located?

on which subject did richard strauss write 'gay viennese ballet'?

which member of 'the oak ridge boys' is a former radio disc jockey?

which of the two hits by 'the fireflies' made it to number 22 in 1959?