Lightning
Thunder
Press when you see the lightning
 
 

Clear


(works offline, loads faster, no ads)


(works offline, loads faster, no ads)


(Ad supported freeware)

This application calculates the distance of a thunder storm by measuring the time between a lightning and the corresponding thunder.

How to use

  • When you see the lightning press the Lightning button.
  • Wait until you hear the thunder and press the Thunder button.
  • Tap the distance to toggle between metric and imperial units
  • With the help of the history list you can see whether the storm comes closer and moves away.

Background

The speed of light is much faster than the speed of sound. By measuring the time between the lightning and corresponding thunder one can easily approach the distance by multiplying the duration with the speed of sound.
Related Applications:
  • Compass - Find out where to go
  • Sunrise - Worldwide sunrise and sunset times
  • Morse Code - Send morse codes with a blinking phone
  • Wind - The current local wind speed and direction

More iPhone Applications:
Tell A Friend   Add to SpeedyMarks