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    Sur
    Sur@sur_272mo
    💭Science💭History
    1920s acoustic aircraft detector

    @sur_27In the 1920s, this aircraft listener operated an early acoustic detection system. The device used scoop-shaped reflectors to funnel engine noise through large listening tubes, allowing operators to pinpoint the direction of approaching planes long before radar was developed.

    元の投稿を見る

    1920s acoustic aircraft detector

    @sur_27さんの写真· Jul 1, 2026· Science

    この写真について

    A young man in a dark blue jacket and gray trousers stands beside a large, weathered metal apparatus mounted on a tripod in an open, arid landscape. He grips one of the tripod legs with his right hand while looking directly at the camera, his body partially obscured by the bulky equipment. The device features two large, dish-shaped reflectors, one on each end of a horizontal pipe assembly, with visible wear and faded markings on the metal surfaces. The background shows a dry, flat plain stretching toward low hills under a bright blue sky with scattered clouds. The overall style is a vintage color photograph with a documentary, historical feel.

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    Anthropic Is Building a Real Biology LabAnthropic Is Building a Real Biology LabCarl Sagan quote on the starsCarl Sagan quote on the starsElias 2-24 b youngest planet discovery2Elias 2-24 b youngest planet discoverySheehan Periodic Table AbundanceSheehan Periodic Table AbundanceAlbert Einstein quote WORLD OF SCIENCEAlbert Einstein quote WORLD OF SCIENCEPaul Dirac quotePaul Dirac quotemathematics language vs toolmathematics language vs toolmathematics astronomy biology gridmathematics astronomy biology gridCarl Sagan star stuff quoteCarl Sagan star stuff quotebee collecting nectarbee collecting nectarHuman brain anatomy illustration2Human brain anatomy illustrationMichio Kaku on Einstein's Mind of GodMichio Kaku on Einstein's Mind of GodTerence Tao on his weaknessesTerence Tao on his weaknessesRichard P. Feynman quoteRichard P. Feynman quoteGenetically engineered mice with human cells2Genetically engineered mice with human cellsobsessed with this face4obsessed with this faceChilean tree daisy conservation effort2Chilean tree daisy conservation effortOctopus DNA editing2Octopus DNA editing
    写真
    Sur
    Sur@sur_272mo
    💭Science💭History
    1920s acoustic aircraft detector

    @sur_27In the 1920s, this aircraft listener operated an early acoustic detection system. The device used scoop-shaped reflectors to funnel engine noise through large listening tubes, allowing operators to pinpoint the direction of approaching planes long before radar was developed.

    元の投稿を見る

    1920s acoustic aircraft detector

    @sur_27さんの写真· Jul 1, 2026· Science

    この写真について

    A young man in a dark blue jacket and gray trousers stands beside a large, weathered metal apparatus mounted on a tripod in an open, arid landscape. He grips one of the tripod legs with his right hand while looking directly at the camera, his body partially obscured by the bulky equipment. The device features two large, dish-shaped reflectors, one on each end of a horizontal pipe assembly, with visible wear and faded markings on the metal surfaces. The background shows a dry, flat plain stretching toward low hills under a bright blue sky with scattered clouds. The overall style is a vintage color photograph with a documentary, historical feel.

    Scienceの写真をすべて見る

    ?

    まだコメントはありません。最初のコメントを投稿しましょう！

    Scienceの写真をもっと見る

    Scienceの写真をすべて見る
    Anthropic Is Building a Real Biology LabAnthropic Is Building a Real Biology LabCarl Sagan quote on the starsCarl Sagan quote on the starsElias 2-24 b youngest planet discovery2Elias 2-24 b youngest planet discoverySheehan Periodic Table AbundanceSheehan Periodic Table AbundanceAlbert Einstein quote WORLD OF SCIENCEAlbert Einstein quote WORLD OF SCIENCEPaul Dirac quotePaul Dirac quotemathematics language vs toolmathematics language vs toolmathematics astronomy biology gridmathematics astronomy biology gridCarl Sagan star stuff quoteCarl Sagan star stuff quotebee collecting nectarbee collecting nectarHuman brain anatomy illustration2Human brain anatomy illustrationMichio Kaku on Einstein's Mind of GodMichio Kaku on Einstein's Mind of GodTerence Tao on his weaknessesTerence Tao on his weaknessesRichard P. Feynman quoteRichard P. Feynman quoteGenetically engineered mice with human cells2Genetically engineered mice with human cellsobsessed with this face4obsessed with this faceChilean tree daisy conservation effort2Chilean tree daisy conservation effortOctopus DNA editing2Octopus DNA editing