It is necessary, up to, 30 seconds to see a visible lightning strike after heard a thunder.
What is lightning?
Lightning is a very intense electric current that occurs in the atmosphere with a typical duration of half a second and a typical trajectory with a length of 5 to 10 km. The phenomenon is a consequence of the rapid movement of electrons from one place to another.
See more about wheather at: https://brainly.com/question/27984155
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