A Moment of Science

Posts tagged narrow space

April 15, 2009

 

Chunnel entrance on England's side

Ear-friendly Train Tunnels

The most famous tunnel is the thirty mile "Chunnel" between England and France. The Chunnel is actually two separate tunnels, connected by cross passages.

April 14, 2009

 

Inside train tunnel

Popping Ears on a Train

When a train enters a tunnel, it compresses the air in front of it like a piston. Air in a tunnel can't be simply pushed aside--the tunnel walls are in the way.

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