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Lightning Distance Formula:
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The lightning distance calculation estimates how far away a lightning strike occurred based on the time between seeing the flash and hearing the thunder. This method is commonly used in the UK and follows the simple formula: Distance = Time / 3.
The calculator uses the lightning distance formula:
Where:
Explanation: Sound travels at approximately 343 m/s (0.343 km/s), meaning it takes about 3 seconds to travel 1 kilometer. This simple calculation provides a quick estimate of lightning distance.
Details: Calculating lightning distance is important for safety during thunderstorms. If the time between flash and thunder is decreasing, the storm is approaching, and you should seek shelter immediately.
Tips: Enter the time in seconds between seeing the lightning flash and hearing the thunder. The value must be greater than 0. The result will show the estimated distance in kilometers.
Q1: Why divide by 3 specifically?
A: Sound travels approximately 1 kilometer in 3 seconds, making this a simple and memorable calculation for estimating lightning distance.
Q2: How accurate is this calculation?
A: It provides a reasonable estimate for most purposes, though actual sound speed can vary slightly with temperature and humidity.
Q3: When should I be concerned about lightning distance?
A: If the calculated distance is less than 10km, you should seek shelter immediately as the storm is dangerously close.
Q4: Can I use this calculation for other sound sources?
A: While the principle is similar, this specific formula is optimized for lightning distance estimation in typical UK conditions.
Q5: What if I count the time in minutes instead of seconds?
A: The formula requires time in seconds. Convert minutes to seconds by multiplying by 60 before using the calculator.