The document discusses several topics in physical optics including:
1) Double-slit interference and how constructive and destructive interference occur based on the path difference between light waves.
2) Thin-film interference caused by light reflecting off the top and bottom surfaces of a thin film, which can produce colorful interference patterns.
3) Diffraction at a single slit and how the diffraction pattern is determined by the slit width and wavelength of light.
1. BahanKuliahFisikaDasar2
OptikaFisis
oleh
Ishafit
http://hafit.pfis.uad.ac.id
Program StudiPendidikanFisika
UNIVERSITAS AHMAD DAHLAN
YogyakartaHubble Space Telescope
4. Physics Phenomenon
Thin-film interferenceThin-film interference is the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface.If the thickness of the film is on the order of the wavelength of light, then colorful patterns can be obtained, as shown in the image below,
13. Air (n=1) Soap film (n>1) Air (n=1) Incident light1800Phase change18000000Phase changeReflected lightTransmitted lightSurface 1Surface 2tDari teoridaneksperimenelektro- magnetik, diperoleh: 1.Jikan1<n2, phase gelombangcahayabergeser1800padaprosespemantulan2.Jikan1>n2, phase gelombangcahayatidakbergeserpadaprosespemantulanIntereferensidestruktifterjadiketika: med2λmt= Intereferensikonstruktifterjadiketika: med) 21(2λ+=mt
14. Panjanggelombangdimedium dapatdinyatakandenganpanjanggelombangdalamvacuum, yaitu: ncnncvλυυυλ=⎟⎠ ⎞ ⎜⎝ ⎛=⎟⎠ ⎞ ⎜⎝ ⎛==11mednmt λ =2nmtλ ⎟⎠ ⎞ ⎜⎝ ⎛+= 212
The sum of the phase changes caused by both reflections is equal to 00or 3600
(Constructive)
The sum of the phase changes caused by both reflections is equal to 1800
(Destructive) nmt λ =2nmtλ ⎟⎠ ⎞ ⎜⎝ ⎛+= 212
(Destructive)
(Constructive)