Light is incident on a glass plate `(mu=1.5)` such that angle of refraction is `60^(@)` dark band is observed corresponding to the wavelength of 6000Å. If the thickness of glass plate is `1.2xx10^(-3)` mm. calculate the order of the interference band.

Light is incident on a glass plate of refractive index 3.0 such that angle of refraction is 60° .Dark band is observed corresponding to the wavelength of 6000 A .If the thickness of glass plate is 1.2x 10^(-3) mm. Calculate the order of the interference band for reflected system.

Light is incident on a glass plate of refractive index 3.0 such that angle of refraction is 60° .Dark band is observed corresponding to the wavelength of 12000 A .If the thickness of glass plate is 1.2 x 10^(-3) mm. Calculate the order of the interference band for reflected system.

Light of wavelength 6000Å is incident on a thin glass plate of refractive index 1.5 such that angle of refraction into the plate is 60^(@) . Calculate the smallest thickness of plate which will make it appear dark by reflection.

Light of wavelength 6000Å is incident on a thin glass plate of refractive index 1.5 such that angle of refraction into the plate is 60^(@) . Calculate the smallest thickness of plate which will make it appear dark by reflection.

Light of wavelength 6000Å is incident on a thin glass plate of refractive index 1.5 such that angle of refraction into the plate is 60^(@) . Calculate the smallest thickness of plate which will make it appear dark by reflection.

Light is incident on a glass plate at an angle of 60^@ . The reflected and refracted rays are mutually perpendicular to each other. The refractive index of the plate is

Light of wavelength 3000A is incident on a thin glass plate of refractive index 1.5 such that angle of refraction into plate is 60° .calculate the thickness of plate which will make it appear dark by reflection?

White light is incident on a soap film at an angle of 60^@ . On examining the reflecting light by a spectroscope, a dark band corresponding to wavelength 6200Å is found. Find the minimum thickness of the film. Take refractive index of film = 1.33.

A parallel beam of sodium light of wavelength 6000 Å is incident on a thin glass plate of mu=1.5 , such that the angle of refraction in the plate is 60^(@) . The smallest thickness of the plate which will make it appear dark by reflected light is