In a Young's double slit experiment two narrow slit 0.8 mm apart are illuminated by the same source of yellow light (l = 5893 Å). If distance between slits and screen is 2m then separation between adjacent bright lines will be

14.73 mm                                              14.73 cm  1.473 mm  147.3 mm

1.473 mm

$ \beta = \frac{\lambda D}{d} = \frac{5893\times 10^{-10}\times 2}{8\times 10^{-4}} = 0.1473cm$