Optics 6 Question 32
34. Two coherent monochromatic point sources and of wavelength are placed symmetrically on either side of the centre of the circle as shown. The sources are separated by a distance . This arrangement produces interference fringes visible as alternate bright and dark spots on the circumference of the circle. The angular separation between two consecutive bright spots is . Which of the following options is/are correct?
(2017 Adv.)
(a) The angular separation between two consecutive bright spots decreases as we move from
(b) A dark spot will be formed at the point
(c) The total number of fringes produced between
(d) At
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Solution:
at
Number of maximas will be
Hence, bright fringe will be formed.
At
For (a) option
As we move from