Question

In YDSE, separation between slits is 0.15 mm, distance between slits and screen is 1.5 m and wavelength of light is 589 nm, then fringe width is

(1) 5.9 mm 

(2) 3.9 mm 

(3) 1.9 mm 

(4) 2.3 mm

Answer 1

Answer is (1)