Quest GiggleHow long are LIGO's detector arms?
4,000 metres. It can spot a length change 10,000 times smaller than a single proton.
How close would your guess have been?
In the game we ask it like this: “Each arm of the LIGO gravitational-wave detector is how many metres long?”
Type a number — scored exactly the way a round in the game is.
The answer
4,000metres
4,000 metres in other units
- 13,123 feet
