Two spectral lines of sodium `D_1` and `D_2` have wavelength of approximately `5890 overset (@)(A)` and `5896 overset (@)(A)`. A sodium lamp sends incident plane wave onto a slit of width `2 xx 10^-6 m`.A screen is located 2 m from the slit. Find the spacing between the first maxima of two sodium lines as measured on the screen.

A plane wave of wavelength 5500 overset@A is incident normally on a slit of width 2 xx 10^-2 cm . The width of the central maximum on a screen 50 cms away is

Light of wavelength 6000 overset (@)(A) is incident normally on a slit . The first minimum in the diffraction pattern is observed to be at a distance of 6 mm from the central maximum on a screen , which is at a distance of 2 m from the slit . Calculate the width of the slit .

Plane wavefront of light of wavelenght 5500 overset (@)(A) is incident on two slits in a screen perpendicular to the direction of light rays. If the total separation of 10 bright fringes on a screen 2 m away is 2 cm, find the distance between the sits .

In Young's experiment, the distance between two slits is 0.8mm and the distance of the screen from the slit is1.2 m. If the fringe width is 0.79 mm, the wavelength of light used is

In a biprism experiment , the distance between the slit and the focal plane of the eyepiece is 1.2 m and the wavelength of light used is 5000 overset (@)(A) . When a convex lens is interposed (between the biprism and eyepiece) the images of the slits in the two positions are 5 mm and 1.8 mm apart . The distance between the centre of the pattern and twelfth dark band is

In Young's experiment, the pinholes are illuminated, by a monochromatic light of wavelength 5200 overset (@)(A) . A screen is placed at 1 m from the slit. If the pinholes are 1.3 mm apart, find i)fringe width ii) the distance between the seventh bright band on one side and sixth dark band on the other side of the central bright band.

A biprism is placed 5 cm from slit illuminated by sodium light of wavelength 5890 overset (@)(A) The width of the fringes obtained on a screen 75cm from the biprism is 9.424 xx 10^-2 cm . What is the distance between two coherent sources ?

A monochromatic light of lambda = 5000 overset (@)(A) is incident on two slits separated by a distance of 5 xx 10^-4 m . If a thin glass of thickness 1.5 x 10^-6 m and refractive index 1.5 placed between one of the slits and screen . The phase difference introduced at the position of central maxima is

In biprism experiment,the slit is illuminated by a light of wavelength 5890 overset (@)(A) . The distance between the slit and eyepiece is 80 cm. The two virtual images of the slit are formed 0.2 cm apart. Calculate the change in the bandwidth if the eyepiece is displaced by 10 cm away from the slit.