None ntawm cov khoom ntawm nthwv dej yog hloov pauv los ntawm kev sib txawv. Lub wavelength, zaus, lub sij hawm thiab ceev yog tib yam ua ntej thiab tom qab diffraction. Qhov kev hloov pauv nkaus xwb yog qhov kev taw qhia uas nthwv dej taug kev.
Diffraction cuam tshuam li cas wavelength?
Tus nqi ntawm qhov sib txawv (qhov tob ntawm qhov khoov) nce nrog nce wavelength thiab txo qis nrog txo wavelength. Qhov tseeb, thaum lub wavelength ntawm lub nthwv dej me dua qhov kev cuam tshuam, tsis muaj qhov pom qhov txawv txav tshwm sim.
Diffraction wavelength yog dab tsi?
Diffraction yog qhov kis tawm ntawm nthwv dej thaum lawv dhau los ntawm qhov aperture lossis ib puag ncig cov khoom. Nws tshwm sim thaum lub qhov loj ntawm qhov aperture lossis kev cuam tshuam yog qhov kev txiav txim ntawm qhov loj me raws li qhov wavelength ntawm qhov xwm txheej yoj Rau qhov me me aperture, feem ntau ntawm cov nthwv dej raug thaiv.
Puas ntev wavelength sib txawv ntau dua los yog tsawg?
Yog tias lub qhov me dua lub wavelength, ces lub wavefronts tawm ntawm lub qhov yuav ncig. Yog li ntawd, ntev wavelengths sib txawv ntau dua li luv wavelengths. Diffraction tshwm sim nrog txhua yam nthwv dej, suav nrog dej hiav txwv nthwv dej, suab thiab lub teeb.
Vim li cas luv luv wavelength txawv dua?
Hloov pauv, raws li lub wavelength txo qis, lub kaum sab xis ntawm diffraction txo. Nyob rau hauv luv luv, lub lub kaum sab xis ntawm diffraction yog ncaj qha proportional rau qhov loj ntawm lub wavelength. Li no lub teeb liab (ntev wavelength) txawv ntau dua li lub teeb xiav (short wavelength).
