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一、有关声速与光速的比较例1 打雷时,某同学看到闪电5s后听到雷声.问打雷处距该同学有多远.(设当时空气中的声速为340m/s)
1. Comparison of Speed of Sound and Speed of Light 1 When thunder strikes, a classmate hears thunder after 5s of lightning and asks how far the thunder is from the classmate. (At the time, the speed of sound in the air was 340m/s)