Hauv qhov tam sim no MacGyver rov, tus cwj pwm siv lub teeb dub improvised kom nrawm nrawm nrawm cov ntawv zais zais ntawm phab ntsa. Koj tuaj yeem pom qhov sib lawv liag ntawm no, nrog rau qhov caveat tias kuv tam sim no yog tus kws pab tswv yim qhia. Txawm li cas los xij, tsuas yog ib lub sijhawm me me muaj ntau yam ntxim nyiam.
"Blacklight" - yog dab tsi?
Nws muaj tseeb tias nws tsis yog lub teeb tsaus. Nws yog qhov zoo dua los xa mus rau nws li UV teeb. Cia peb pib nrog me ntsis kev taw qhia rau lub teeb. Txawm tias qhov tseeb tias lub teeb yog electromagnetic yoj (piv txwv li, oscillating hluav taws xob thiab magnetic teb), qhov zaus yog qhov tseem ceeb ntawm no. Qhov pom spectrum yog qhov ntau ntawm cov zaus uas tib neeg lub qhov muag muaj peev xwm txheeb xyuas cov nthwv dej no. Peb ob lub qhov muag pom nthwv dej ntawm qis zaus raws li xim liab, whereas nthwv dej ntawm ntau zaus yuav violet.
Ntawm no yog ib daim duab uas yuav pab tau.
Ntsiab rau lub caij nplooj zeeg Sketch 2016
Lawm, cov xim no yuav muab faib ua xya pawg: liab, txiv kab ntxwv, daj, ntsuab, xiav, indigo, thiab violet. Dab tsi yog heck yog indigo, tab sis? Qhov tseeb, koj tuaj yeem faib qhov no rau hauv peb lub xim - liab, ntsuab, thiab xiav - lossis ib txhiab, yog tias koj xav tau. Kuv piav qhia rau kuv cov menyuam tias muaj xya hues vim Isaac Newton xav tias yuav tsum muaj ntau. Tsuas muaj xya yam khoom txav mus los hauv lub ntuj thaum Newton lub sijhawm: Lub Hnub, Lub hli, Mars, Mercury, Jupiter, Venus, thiab Saturn. Qhov tseeb lom zem: Hnub ntawm lub limtiam uas muaj npe tom qab cov khoom no tau teem rau tib lub sijhawm. Txuag nws (nrog rau cov txiv tsawb radioactive) rau ib tog.
Koj lub hlwb pom lub teeb dawb vim yog kev sib txuas tag nrho cov teeb ci no. Koj lub hlwb pom qhov tsis muaj lub teeb raws li cov xim dub, uas yog vim li cas ib chav uas tsaus nti nkaus li dub. Yuav ua li cas yog lub ultraviolet thiab infrared feem ntawm lub spectrum, ho? Lawv qhov kev tshawb pom tuaj yeem siv los piav qhia lawv lub npe thiab txoj haujlwm thoob plaws lub spectrum. William Herschel tau siv lub prism los faib lub teeb dawb rau hauv tag nrho cov xim ntawm zaj sawv hauv xyoo 1880. Nws pom tias thaj chaw dhau los ntawm lub teeb liab liab yuav tseem sov yog tias nws tso lub ntsuas kub rau ntawd. Tus pas ntsuas kub yuav tsum tau ua kom sov los ntawm lub teeb uas tib neeg tsis tuaj yeem pom. Nws xa mus rau nws li infrared vim nws qis dua liab. UV muaj cov khoom zoo ib yam.
