Video: Tus xov tooj raug nqi pes tsawg xyoo 1876?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Thawj tus xov tooj nyob deb nqi txog $9 rau tsib feeb, muaj li 30 feeb ntawm lub sijhawm tham tiag tiag, thiab, raws li lub tshuab tag nrho, nqi kwv yees li $3,995. Vim nws txoj kev lag luam tawm tsam 1876 , Tswb tau muab muag nws patent rau Western Union rau $ 100,000.
Tom qab ntawd, lub xov tooj raug nqi npaum li cas thaum thawj zaug tawm?
Ua ntej cov neeg siv khoom tso tawm ntawm DynaTAC, Martin Cooper tau ua lub ntiaj teb ua ntej Kev hu xov tooj ntawm tes puas tau siv tus thawj coj ntawm DynaTAC. Tsis yog leej twg tuaj yeem yuav lub xov tooj DynaTAC: lub xov tooj hnyav 1.75 phaus, muaj sijhawm 30 feeb tham, thiab nqi $3, 995.
Tsis tas li ntawd, lub xov tooj raug nqi pes tsawg xyoo 1920? Thaum pib ntawm lub xyoo pua, lub tswb system tau them $ 99 ib txhiab hu hauv New York City; los ntawm thaum ntxov Xyoo 1920s tus nqi tsev nyob ib hlis twg ntawm $3 yog qhov raug.
Hais txog qhov no, lub xov tooj raug nqi pes tsawg xyoo 1880?
Cov nqe rau kev hu mus deb yog $9 rau thawj tsib feeb. Tswb ua tsis nres nrog cov xov tooj . Hauv 1880 Nws tau tsim lub photophone, uas xa suab ntawm lub teeb ntawm lub teeb thiab yog tus thawj coj ntawm fiber ntau optics, uas tau hloov pauv kev sib txuas lus hauv xyoo pua 20th.
Lub xov tooj raug nqi pes tsawg xyoo 1900?
Cov nqi ntawm xov tooj kev pabcuam yog $3.00 rau kev lag luam thiab $1.50 rau cov neeg siv khoom nyob.
Pom zoo:
Lub thawv xov tooj raug nqi pes tsawg?
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