When light from two sources (say slits S1 and S2) interfere, they from alternate dark and…
Physics · JEE Advanced · NTA Exams — Optics
When light from two sources (say slits S1 and S2) interfere, they from alternate dark and bright fringes. Bright fringes is formed at all points where the path difference is an odd multiple of half wavelength. At the condition of equal amplitudes, A1 = A2 = a, the maximum intensity will be 4a2 and the visibility improves. The resultant intensity can also be indicated with phase factors as I = 2a2 cos2 (φ/2). Using this passage, answer the following questions.
If the slits S1 and S2 are arranged as shown, the ratio of intensity of fringe at P and R is
- 0
-
- 1:1
- 1:2
Answer
(A) 0
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