Question

With a wavelength of 5000 Å, fringe width is 0.5 mm. If separation between the slits is doubled and wavelength used in 6000 Å. Find new fringe width: 

(1) 0.3 mm

(2) 0.5 mm

(3) 0.7 mm

(4) 0.9 mm

Answer 1

Correct option is (1) 0.3 mm