In a Fresnel's biprism experiment, sodium light of wavelength `5832 Å` is used. Calculated the fringe width, given the distance between the screen and the biprism =120 cm and the distance the two sources=0.04 cm.

If in a biprism experiment, light of wavelength 5000 Å is replaced by 10,000 Å, then the fringes will

In a biprism experiment, light of wavelength 5200 Å is used to get an interference pattern on the screen. The fringe width changes by 1.3 mm when the screen is moved towards biprism by 50 cm. Find the distance between two virtual image of the slit.

In a biprism experiment, when sodium light of wavelength 5890 Å is used then twenty fringes are observed in 23 mm distance on screen. In order to obtain 30 fringes in 28 mm of the interference pattern, one should use light of wavelength :

In Fresnel’s biprism experiment, which of the following light sources used to locate central fringe :

In a biprism experiment, a slit is illuminated by a light of wavelength 4800 . The distance between the slit and biprism is and the distance between the biprism is 15cm and the distance between the biprism and eyepiece is 85cm . If the distance between virtual sources is 3mm , determine the distance between 4th bright band on one side and 4th dark band on the other side of the central bright band.

In a biprism experiment, if we want to increase the fringe width (X), by keeping the distance between theslit and the screen (D) constant, then we should

In a biprism expeirment , light of wavelenght 5200Å is ued to get an interference pattern on a screen. The fringe width changes by 0.13 mm when the screen is brought towards the biprism by 50 cm . The distance between the virtual images of the slit is

In Fresnel’s biprism experiment if the screen is moved away from the biprism, then the fringe width will :