In Young's double slit experiment, slit separation is `0.6 mm` and the separation between slit and screen is `1.2m`. The angular width is (the wavelength of light used is `4800Å`)

In a Young’s double slit experiment, the slit separation is 0.2 cm , the distance between the screen and slit is 1 m . Wavelength of the light used is 5000 Å . The distance between two consecutive dark fringes (in mm ) is

In Young's double slit experiment, the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width is

In yound's double slit experiment, the separation between the slits is halved and distance between the slits and screen is doubled. The figure width is