John Andrew Higgins 是一位在南極工作的地球科學專家，有一天他丟了一塊約20公分的冰塊到一個深約137公尺的冰洞裡，一開始是固體匡啷匡啷彼此碰撞的聲音，到最後竟然發出「咻」像是在電影裡雷射槍的射擊聲，難道丟垃圾到南極冰層下真的可以觸發地球發出雷射嗎？
What does a 9 inch ice core sound like when dropped down a 450 foot hole? Like this! Credit to @peter_neff for the idea and @Scripps_Polar, @sciencejenna, @GeosciencesPU, @US_IceDrilling, and @paleosurface for the execution! pic.twitter.com/pW7LxKdbUB
— John Andrew Higgins (@blueicehiggins) February 7, 2020
冰川學家Peter Neff 說，這一切都是都卜勒效應的陰謀啦。都卜勒效應最常舉的例子就是救護車的鳴笛聲會隨著救護車移動而改變音調，這是因為波源和觀察者有相對運動時，觀察者接受到波的頻率與波源發出的頻率並不相同的現象，而聲波在這個細長的冰洞裡不斷的反彈，除了聽到雷射槍最後還會聽到「咚咚」的聲音。
🔊🔊Sound ON🔊🔊
— Peter Neff (@peter_neff) February 28, 2018
When #science is done, it's fun to drop ice down a 90 m deep borehole in an #Antarctic 🇦🇶 #glacier ❄️. So satisfying when it hits the bottom.
Happy hump day. pic.twitter.com/dQtLPWQi7T
Here’s the story on this crazy sound (V1), plus the basic science @blueicehiggins, myself, & others do studying past climate with #Antarctic ice cores. 🇦🇶🧊❄️ pic.twitter.com/QAtjcxXXGh
— Peter Neff (@peter_neff) February 8, 2020
這裡看更多。
