Thaum helium-4 txias rau hauv qab li 2.2 K, nws pib coj tus cwj pwm txawv heev. Nyob rau hauv 1908, Heike Kamerlingh Onnes thawj liquefied helium ntawm University of Leiden hauv Netherlands. … Tsis ntev no muaj ob peb yam lus qhia txog tus cwj pwm coj txawv txawv ntawm cov kua helium.
Vim li cas superfluid tshwm sim?
Superfluidity tshwm sim nyob rau hauv ob isotopes ntawm helium (helium-3 thiab helium-4) thaum lawv liquefied los ntawm txias rau cryogenic kubNws kuj yog ib yam khoom ntawm ntau lwm yam kab txawv xeev. ntawm qhov teeb meem theorized kom muaj nyob rau hauv astrophysics, high-zog physics, thiab theories ntawm quantum gravity.
Vim li cas helium thiaj dhau los ua cov kua dej ntau tshaj?
Thaum helium txias rau qhov kub tseem ceeb ntawm 2.17 k, ib qho kev tsis txaus ntseeg hauv kev muaj peev xwm pib tshwm sim, thiab ib feem ntawm cov kua los ua cov xoom viscosity "Superfruid". Nws yog hu ua lambda taw tes vim hais tias cov duab ntawm ib tug tshwj xeeb kub nkhaus yog zoo li ntawd Greek tsab ntawv.
Leej twg invented superfluidity?
Tab sis nws tsis yog txog thaum kawg ntawm xyoo 1930 uas Pjotr Kapitsa (Nobel nqi zog hauv Physics 1978) nrhiav pom qhov tshwm sim ntawm superfluidity hauv helium-4, qhov tshwm sim thawj zaug piav qhia schematically los ntawm Fritz London thiab tom qab ntawd nthuav dav los ntawm Lev Landau (Nobel nqi zog hauv Physics 1962).
Leej twg tshawb nrhiav superfluidity ntawm cov kua helium?
Thaum Cornell physicists Robert Richardson, David Lee thiab Douglas Osheroff tau txais 1996 Nobel nqi zog rau lawv qhov kev tshawb pom ntawm lub xeev superfluid ntawm cov kua helium, nws tsuas yog qhov pib.
