Question

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era un elence (o) at P, In radians, between these two waves: You might consider that the phase difference (what you want) is related to the path difference (what you are given) between the waves Determine the number of bright fringes inside the central diffraction envelope for a double-slit pattern if = 580 nm, d = 0.150 mm, and a = 25.0 um. What is the ratio of the intensity of the fourth bright interference fringe to that of the central fringe? Remember that the diffraction envelope dictates the intensity here! Two identical slits are illuminated by laser light of wavelength 630 nm. A fringe pattern is observed on a screen 4.00 m from the double-slit. It is noted that the 4th order interference fringe is 'MISSING' and that the spacing between adjacent bright fringes is 1.00 cm. a) Find the width 'a' of the slits and their separation 'd' b) Sketch a graph of the intensity along the screen, Spacing, shape, peak height etc. is always important in sketches

Answer 1

Anence 0 given her wave length dietance between width of slete a = 580nm slits d = o.45 mm a= 25 um no of bright fringes mod= 0.15 x 153 25 xung = 6 2 for Be no of bright pripe m ů a ② we know, forth ? I(0) a Im cospfs in a trong ) - Now, sino=ma Xa nasno siro= 0.0156 - we get 3 B= 12.5 rad 22.08 rad | e from an o I(0) . cus (1215) | sin (2:08) Im adsino 208

TO) 2 10.99773" x 10.873139 (2.08) In Ilo) = 0.115 19) 2015) ALL AM
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