Гром - звуковое явление в атмосфере

Гром - звуковое явление в атмосфере, сопровождающее разряд молнии. Гром представляет собой колебания воздуха под влиянием резкого повышения давления воздуха на пути молнии, вследствие его нагревания приблизительно до 30 000 °С. Раскаты грома возникают из-за того, что молния имеет значительную длину и звук от разных её участков доходит до уха наблюдателя не одновременно, кроме того, возникновению раскатов способствует отражение звука, а также потому, что из-за рефракции звуковая волна распространяется по различным путям и приходит с различными запазданиями. Громкость раскатов грома может достигать 120 децибел.

Измеряя интервал времени прошедший между вспышкой молнии и ударом грома можно определить расстояние, на котором находится гроза. Так как скорость света очень велика по сравнению со скоростью звука, то ею можно пренебречь, учитывая лишь скорость звука, которая составляет приблизительно 340 метров в секунду. Таким образом, умножив время между вспышкой молнии и ударом грома в секундах на эту величину можно судить о близости грозы, о том приближается ли гроза к наблюдателю (интервал между молнией и громом сокращается) или удаляется (интервал увеличивается). Как правило, гром слышен на расстоянии до 15-20 километров, таким образом если наблюдатель видит молнию, но не слышит грома, то гроза находится на расстоянии не менее 20 километров.

Результаты (английский) 1:

Thunder-sound phenomenon in the atmosphere that accompanied the lightning. Thunder is a fluctuation of air under the influence of a sharp rise in air pressure on the lightning path, due to its heat up to approximately 30000° c. Peals of Thunder occur because the Lightning has a significant length and sound from different sites it comes to the ear of an observer does not at the same time, moreover, raskatov promotes reflection of sound, and also because due to the refraction of sound wave propagates in various ways and comes with different zapazdaniâmi. Volume raskatov Thunder can reach 120 decibels. By measuring the time interval between the Flash of lightning and Thunder strike you can determine the distance at which thunderstorm. Because the speed of light is very large compared to the speed of sound, then it can be neglected, considering only the speed of sound, which is approximately 340 meters per second. Thus, multiplying the time between the Flash of lightning and Thunder strike in seconds on this value you can judge the proximity of thunderstorms, that determining whether a thunderstorm to the observer (the interval between lightning and Thunder is reduced) or removed (interval increases). Generally, Thunder is heard at a distance of 15-20 kilometers, thus if you observer sees lightning, but can't hear thunder, thunderstorm is located at a distance of not less than 20 kilometers.

Результаты (английский) 2:

Thunder - a sound phenomenon in the atmosphere that accompanies lightning. Thunder is a vibration in the air under the influence of a sharp rise in air pressure in the path of lightning, because of its heat to about 30,000 ° C. Thunder arise due to the fact that the zipper has a considerable length and sound of its various portions comes to the ear of the observer not simultaneously, moreover, the appearance rolls promotes reflection of sound, as well as because of refraction sound wave propagates along different paths and comes with a variety of zapazdaniem. Volume thunder can reach 120 decibels. By measuring the amount of time elapsed between the flash of lightning and thunder is possible to determine the distance at which the storm. Since the speed of light is very large compared to the speed of sound, it can be neglected, considering only the speed of sound, which is about 340 meters per second. Thus, multiplying the time between a flash of lightning and a clap of thunder in seconds, this value can be judged close thunderstorms that if a thunderstorm is approaching the observer (the interval between lightning and thunder is reduced) or removed (interval increases). As a rule, the thunder is heard at a distance of 15-20 kilometers, so if the observer sees lightning, but can not hear the thunder, the storm is at least 20 kilometers.

Результаты (английский) 3:

thunder - acoustical phenomenon in the atmosphere following a lightning bolt. thunder is a variation of air under the influence of the abrupt increase of air pressure in the path of the bolt.due to its heating to approximately 30 000 plates. thunder arise because the flash has a substantial length and noise from different sites comes to her ear, observer, not at the same time, moreover, thethe emergence of than is reflected sound, and also because of the refraction sonic wave spreading in various ways and comes with various запазданиями.volume than thunder can reach 120 decibels.

by measuring the time interval between the flash of lightning and the thunder stroke can determine the distance, which is a storm.since the speed of light is very high compared to the speed of sound, it can be ignored, given only the speed of sound, which is about 340 meters per second. thus, thewith the time between the flash and thunder lightning strike in seconds on that value to judge the proximity of the storm.