4. A glass plate of thickness 1.5 um and refractive index 1.5 is introduced between one of the slits and screen in a Young's double slit experiment. If the wavelength of the monochromatic source used is - 0.25 um, the phase difference between the interfering waves at the centre of the screen is equal to a) 67 b) 37 What is the velocity of light in a medium with refractive index 1.57 b) 3 x 10 m/s

A monochromatic light of wave length 500 nm falls normally on the double slit of young ‘s double slit experiment with slit separation of 0.5 mm one slit is covered with non –absorbing glass plates of thickness 1.5 µm and refractive index 1.5, Determine (i) Extra optical path introduced by the glass plate (ii) Intensity at the centre of the screen if the screen is at a distance of 1.0 m from slits

A Young's double slit experiment is observed in a medium of refractive index $1.33$ using light of wavelength $600nm$ and with slit separation $0.45mm$. When a thin glass plate of refractive index $1.5$ is introduced in one of the beams the central bright fringe formed on a screen placed $1.5m$ away is found to shift through a distance of $4.33mm$. The thickness of the glass plate is

In a Young's double slit experiment shown in the figure, a parallel beam of light is incident on the slits from a medium of refractive index ${\mu }_1$.The wavelength of light in this medium is ${\lambda }_1$. A transparent slab of thickness t and refractive index ${\mu }_3$ is put in front of one slit.The refractive index of medium between the screen and the plane of the slits is ${\mu }_2$.Find the phase difference between the light waves at point O (symmetrical, relative to the slits) .

Light of wavelength $$500\ nm$$ is used to form interfrence pattern in Young's double slit experiment. A uniform glass plate of refractive index $$1.5$$ and thickness $$0.1\ mm$$ is introduced in the path of one of the interfering beams. the number of fringes which will shift the cross wire due to this is

Light of wavelength 500 nm is used to form interference pattern in Young's double slit experiment. A uniform glass plate of refractive index 1.5 and thickness 0.1 mm is introduced in the path of one of the interfering beams. The number of fringes which will shift the cross wire due to this is: