Two coherent monochromatic point sources S 1 and S 2 of wavelength λ = 600 n m are placed symmetrically on either side of the center of the circle as shown. The sources are separated by a distance d = 1.8 m m . 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 Δ θ . Which of the f

Step-by-step solution

At point P 2 ; Δ x = d = 1.8   m m = 3000   λ Hence a (bright fringe) will be formed at P 2 Now Δ x = d  cos ⁡ θ = n λ cos ⁡ θ = n λ d , θ is with the x - a x i s . - sin θ   Δ θ = Δ n λ d Δ θ = - Δ n   λ d  sin ⁡ θ Δ θ increases as θ decreases At P 2 , the order of fringe will be maximum. For total no. of bright fringes d = n λ     ⇒   &#