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Cara Menghitung Jarak antara Petir dengan Kita

Divide Number of Seconds
by 3 for Distance in Kilometres
or 5 for Distance in Miles.
penjelasan:
• Hitung berapa detik saat anda melihat kilat petir, sampai anda mendengar suara geledek
• lalu bagi 3 untuk mengetahui jarak dalam Kilometer
atau bagi 5 untuk mengetahui jarak dalam Mil
contoh:
Anda melihat kilatan petir, 9 detik kemudian suaranya menggelegar.
Jadi jarak petir dengan diri anda adalah 9/3 = 3 km ( <—- ± kurang lebih)
• Ketika kilat menyala, pada saat itu juga kita langsung melihatnya, karena kecepatan cahaya sangat tinggi, 299.792.458 meter perdetik. Hampir tak ada delay untuk mencapai mata kita.
• Tapi, kecepatan suara “hanya” 331 meter perdetik. Alhasil, beberapa saat setelah kilat menyala, suaranya baru menggelegar.
• Oleh karena itu, jarak petir dengan pendengar suara guruh sekitar 1 kilometer setiap tiga detik. Guruh jarang terdengar pada jarak lebih dari 25 kilometer.