can you help me finding the answer for this question please thank you A laser is shining through narrow, equally spaced slits onto a screen, formingbright and dark "fringes" on the screen. If the number of slits were increased,keeping the distance between adjacent slits the same, how would the shapes of thebright fringes change?bright dark bright dork bnght

Name: can you help me finding the answer for this question please thank you
Uploaded: 2024-03-05T11:56:34.000Z
Channel: Bartleby
Description: can you help me finding the answer for this question please thank you A laser is shining through narrow, equally spaced slits onto a screen, formingbright and dark "fringes" on the screen. If the number of slits were increased,keeping the distance be

To determine: the effect of increase of number of slits on the shape of bright fringes.We learnt that, for N number of slits, between two principle maxima, there are secondary maxima occurs whenever there are unpaired ray are present which are not eliminated due to destructive interference. Secondary maxima can occur at (N-2) evenly spaced positions between the principal maxima. For secondary maxima, the amplitude is reduced to 1/N as compared to the amplitude of the principle maxima. Hence light intensity is diminished to (1/N2) of the intensity compared to the principal maxima. There are dark fringes located between every maxima (Principle and secondary) If N increase then the number of bright and dark fringes increase. Due to the closely located neighboring dark fringes, the number of maxima reduces in width. However, the amount of light energy is constant, so intensity of bright bands increases. So we can conclude that, as the number of slits increases, the number of secondary maxima increases, but the principle maxima become brighter and narrower.