An object is dropped from a certain point $A$ at a height 'h' from the ground. During its journey straight downwards, the object passes points $B$ and $C$ such that the ratio of time taken $t_1$ to cover $A B$ and $t_2$ to cover $B C$ is $1 : (\sqrt{2}-1)$. What is the ratio of distances $A B : B C$?