 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
|
|
thunder
The acoustic shock wave caused by the sudden expansion of air heated by a lightning discharge. Thunder may be a sudden clap, or a rumble lasting several seconds if the lightning path is long and thus varies in distance from the hearer. It is audible up to about 15km away; the distance in kilometers can be roughly estimated as one-third the time in seconds between the lightning and the thunder.
Related category
• ATMOSPHERIC PHENOMENA AND STRUCTURES
Also on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History
Transport Concepts & Designs (partner site)