Diffraction


Diffraction – Path difference


Download 1.24 Mb.
bet4/6
Sana09.04.2023
Hajmi1.24 Mb.
#1344840
1   2   3   4   5   6
Bog'liq
Diffraction

Diffraction – Path difference

  • Notice that these 2 waves are OUT OF PHASE. When they hit they screen they both hit at the different relative positions, one at the bottom of a crest and the other coming out of a trough. Thus their amplitudes SUBTRACT.
  • E'tibor bering, bu 2 ta to'lqin FAZADAN CHAQADI. Ular ekranga urilganda, ikkalasi ham har xil nisbiy pozitsiyalarga toqnashadi, biri tepalikning pastki qismiga, ikkinchisi esa yuqoriga chiqadi. Shunday qilib, ularning amplitudalari AYRILADI.
  • How much farther did the red wave have to travel?
  • Qizil to'lqin qancha masofani bosib o'tishi kerak edi?
  • Exactly – ONE HALF OF A WAVELENGTH
  • Aynan - to'lqin uzunligining bir yarimi
  • 
  • The call this extra distance the PATH DIFFERENCE. The path difference and the ORDER of a fringe help to form another pattern.
  • Ushbu qo'shimcha masofani YO'LLAR FARQI deb nomlang. Yo'l farqi va chekka TARTIBI boshqa naqsh hosil qilishga yordam beradi.

Diffraction – Path Difference

  • 0.5
  • 0.5
  • 1.5
  • 1.5
  • The dark fringes you see on either side of the central maximum are multiple wavelengths from the bright central. And it just so happens that the multiple is the ORDER.
  • Siz markaziy maksimalning har ikki tomonida ko'rgan qorong'u chiziqlar yorqin markazdan bir nechta to'lqin uzunliklari. Va shunday bo'ladiki, ko'plik TARTIB bo'ladi.
  • P.D. = (m+1/2)
  • Destructive)

Path Difference - Summary

  • For CONSTRUCTIVE INTERFERENCE or MAXIMUMS use:
  • For DESTRUCTIVE INTERFERENCE or MINIMUMS use:
  • P.D. = m
  • P.D. = (m+1/2)
  • Where “m”, is the ORDER. Refer to slides 6 and 11.

Download 1.24 Mb.

Do'stlaringiz bilan baham:
1   2   3   4   5   6




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling