Two straight and narrow parallel slits separated by 3mm are illuminated by a monochromatic light of wavelength `5460 overset (@)(A)`. Interference fringes are obtained at a distance of 60 cm from the slits. Find the change in fringe width if the distance between the slits is i) increased by 1 mm and ii) decreased by 1mm.

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 ?

The two slits at a distance of 1 mm are illuminated by the light of wavelength 6.5xx10^-7m .The interference fringes are observed on a screen placed at a distance of 1 m. The distance between third dark fringe and fifth bright fringe will be

How does the angular separation of interference fringes change in Young's experiment, if the distance between slits is increased .

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.

In Young's expriment, interference bands are produced on the screen placed at 1.5 m from the two slits 0.15 mm apart and illuminated by a light of wavelength 6500 overset (@)(A) . Find a) the fringe width and b) the change in the fringe width if the screen is taken away from the slit by 50 cm.

In a biprism experiment, a source of light has a wavelength of 5500 overset@A . Calculate the change in fringe width, if the screen is at a distance of 1 m from the points which are 1mm apart.

In Young's experiment , interference bands are produced on the screen placed at 1.5 m from the two slits separated by a distance of 0.15 mm and illuminated by a light of wavelength 4500 overset (@)(A) . Find the change in fringe width if screen is brought towards the slit by 50 cm .

The angular width of the central maximum in a single slit diffraction pattern is 60^@ . The width of the slit is 1 mu m. The slit is illuminated by monochromatic plane waves. If another slit of same width is made near it, Young’s fringes can be observed on a screen placed at a distance 50 cm from the slits. If the observed fringe width is 1 cm, what is slit separation distance? (i.e., distance between the centres of each slit.)

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.

In a biprism experiment, the width of fringe is 0.12 mm when the eyepiece is at a distance of 100 cm from the slit. What would be the width of the fringe if the eyepiece is moved towards the slit by 25 cm ?