why is the thunder sound heard after the flash of lightning
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ɪᴍᴍᴇᴅɪᴀᴛᴇʟʏ ᴀғᴛᴇʀ ᴛʜᴇ ғʟᴀsʜ, ᴛʜᴇ ᴀɪʀ ᴄᴏᴏʟs ᴀɴᴅ ᴄᴏɴᴛʀᴀᴄᴛs ǫᴜɪᴄᴋʟʏ. ᴛʜɪs ʀᴀᴘɪᴅ ᴇxᴘᴀɴsɪᴏɴ ᴀɴᴅ ᴄᴏɴᴛʀᴀᴄᴛɪᴏɴ ᴄʀᴇᴀᴛᴇs ᴛʜᴇ sᴏᴜɴᴅ ᴡᴀᴠᴇ ᴛʜᴀᴛ ᴡᴇ ʜᴇᴀʀ ᴀs ᴛʜᴜɴᴅᴇʀ. ᴀʟᴛʜᴏᴜɢʜ ᴀ ʟɪɢʜᴛɴɪɴɢ ᴅɪsᴄʜᴀʀɢᴇ ᴜsᴜᴀʟʟʏ sᴛʀɪᴋᴇs ᴊᴜsᴛ ᴏɴᴇ sᴘᴏᴛ ᴏɴ ᴛʜᴇ ɢʀᴏᴜɴᴅ, ɪᴛ ᴛʀᴀᴠᴇʟs ᴍᴀɴʏ ᴍɪʟᴇs ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴀɪʀ.❤
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Immediately after the flash, the air cools and contracts quickly. This rapid expansion and contraction creates the sound wave that we hear as thunder. Although a lightning discharge usually strikes just one spot on the ground, it travels many miles through the air.
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