Los ntawm 1785, Philadelphia inventor David Rittenhouse David Rittenhouse David Rittenhouse yog tus tswv cuab ntawm Pennsylvania los ntawm 1777 txog 1789, thiab nrog cov kev txawj ntse thiab kev pab ntawm George Washington, nws tau los ua thawj tus. tus thawj coj ntawm Tebchaws Meskas Mint. Lub Plaub Hlis 2, 1792, Tebchaws Asmeskas Mint tau qhib nws lub qhov rooj, tab sis yuav tsis tsim cov nyiaj npib rau yuav luag plaub lub hlis. https://en.wikipedia.org › wiki › David_Rittenhouse
David Rittenhouse - Wikipedia
tau xam pom yuav ua li cas los tsim thawj qhov sib txawv grating los ntawm txoj hlua cov plaub hau ntawm ob threaded screws.
Leej twg nrhiav pom qhov sib txawv?
thawj tus txiv neej ua qhov sib txawv grating tau tsim nyob ib ncig ntawm 1785 los ntawm Philadelphia inventor David Rittenhouse, uas strung plaub hau ntawm ob lub xov zoo zoo. Qhov no zoo ib yam li tus kws tshawb fawb German tseem ceeb Joseph von Fraunhofer txoj kev xaim diffraction grating hauv 1821.
Diffraction grating ua li cas?
A diffraction grating yog tsim los ntawm ua ntau qhov sib npaug sib npaug ntawm qhov chaw ntawm cov khoom siv pob tshab. … Ib pawg ntawm cov rays poob rau ntawm qhov grating. Rays thiab wavefronts tsim ib qho orthogonal teeb kom lub wavefronts yog perpendicular rau cov rays thiab parallel mus rau grating raws li qhia.
Diffraction grating yog dab tsi thiab vim li cas thiaj siv?
Diffraction gratings feem ntau siv rau spectroscopic dispersion thiab tsom xam ntawm lub teeb. Dab tsi ua rau lawvTshwj xeeb tshaj yog pab tau yog qhov tseeb hais tias lawv tsim ib tug sharper qauv tshaj ob npaug slits ua. Ntawd yog, lawv qhov ci ntsa iab yog qhov nqaim thiab ci dua thaum lawv thaj chaw tsaus ntuj tsaus dua.
Diffraction grating physics yog dab tsi?
Ib qhov sib txawv ntawm qhov sib txawv yog ib qho khoom siv kho qhov muag uas faib (disperses) lub teeb uas muaj ntau qhov sib txawv wavelengths (piv txwv li, lub teeb dawb) rau hauv cov khoom siv lub teeb los ntawm wavelength. … Thaum lub teeb dawb nkag mus rau hauv lub grating, lub teeb lub teeb yuav txawv ntawm cov ces kaum uas tau txiav txim los ntawm cov wavelengths (diffraction).
