'on' or 'about'

[allthewayanime]

I would like to know if there is a difference between the preposition 'on' and 'about' when we want to talk about a precisely topic.Which one should be chosen:

e.g.I would like to know something more on/about this topic.

[5jj]

There is no real difference.

[david11]

Not a teacher.


We use about to talk about ordinary,more general kinds of communication.
On suggests that a book,talk etc is more serious,suitable for specialists.

1)A book for children about Africa and its people.

A textbook on African history.

2)A conversation about money.

A lecture on economics