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Tuesday, 8 November 2011

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PENGESAN BUNYI SEMASA PERANG DUNIA PERTAMA







Alat ini digunakan sekitar Perang Dunia Pertama oleh pihak British, bertujuan untuk mendengar bunyi kehadiran kapal terbang musuh tatkala ketika itu, radar masih belum dicipta.

A few years ago we posted about these beautiful parabolic structures made of concrete, as a way to magnify sound in the days of World War I. The British used them to listen for incoming enemy fighters in an era that antedated radar.

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MalaysiansMustKnow: What if your car is damaged and broken into at a shopping mall. Is the shopping mall liable? Informative clicks. Tak rugi apa-apapun jika anda mengetahui maklumat ini.




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