Figure shows a set-up to perform Young's double slit experiment. A monochromatic source of light is placed at S. S 1 and S 2 act as coherent sources and interference pattern is obtained on the screen. Match Column-I with Column-II in regard to interference in Young's double slit experiment.
Column-I | Column-II |
(i) A thin transparent plate is placed in front of S1. Assuming negligible absorption by the plate | [A] Interference fringes disappear |
(ii) S1 is closed | [B] There is uniform illumination on a large part of the screen |
(iii) Width of S1 is two times the width of S2 | [C] The zero order fringe will not form at O |
(iv) S is removed and two real sources emitting light of same wavelength are placed at S1 and S2 fring
| [D] Intensity of a dark fringe, though it is less than the intensity of bright will be non-zero |
Text Solution
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Ans.
(i) [C]
(ii) [A],[B]
(iii) [D]
(iv) [A],[B]
Sol. (i) The zero order fringe will not
form at O
(ii) Interference fringes disappear, There is uniform illumination on a large part of the
Screen
(iii) Intensity of a dark fringe, though it is less than the intensity of bright will be non-zero
(iv) Interference fringes disappear, There is uniform illumination on a large part of the screen
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