Bhautik Study

Q. Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source (λ = 632.8 nm). The distance between the screen and the slits is 100 cm. If a bright fringe is observed on screen at a distance of 1.27 mm from the central bright fringe, then the path difference between the waves, which are reaching this point from the slits is close to :

(1) 2.05 μm

(2) 2.87 nm

(3) 2 nm

(4) 1.27 μm                                                        (JEE-2020)