Bhautik Study

Q. In Youngs double slit experiment the separation d between the slits is 2 mm, the
wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to

(1) 2.1 mm

(2) 1.9 mm

(3) 1.8 mm

(4) 1.7 mm                                                                                                                                                                                                                                                                                    (NEET-2018)

(NEET-2018)
NTA Solutions (2):-

Answer (2)