The diagram represents a laboratory experiment in which a feather drops from rest inside a long evacuated vertical tube of length $L$. It takes the feather time $T$ to travel from the top of the tube to the bottom. In time $0.50\,T$, how far below the top of the tube will the feather be?
- A$0.13L$
- B$0.25L$
- C$0.38L$
- D$0.50L$