How does the width of dark fringe in interference pattern vary from that of the bright fringe ?

In a Young’s double slit experiment, the slits are 2 mm apart and are illuminated with a mixture of two wavelengths lambda=750nm and lambda'= 900 nm . At what distance from the common central bright fringe on a screen 1.5 m from the slits will a bright fringe from one interference pattern coincide with a bright fringe from the other?

Monochromatic light from a narrow slit illuminates two narrow slit 0.3 mm apart producing an interference pattern with bright fringes 1.5 mm apart on a screen 75 cm away. Find the wavelength of the light. How will the fringe width altered if the distance of the screen is doubled .

In interference with two coherent beams of light , the fringe width is

How does the intensity of a paramagnetic material vary with temperature?

In a biprism experiment the distance between the slit and the screen is 1 m and the separation of the two virtual images of the slit is 0.4 mm. An interference pattern is obtained with light of wavelength 5.5 xx 10^-7 m . Find the distance between the 3rd and the 8th bright band.

In Young’s double-slit experiment, an interference pattern is obtained on a screen by a light of wavelength 6000overset@A , coming from the coherent sources S_1 and S_2 .At certain point P on the screen, third dark fringe is formed. Then the path difference S_1P-S_2P in microns is

In Young's double slit experiment the slits are 0.5 mm apart and interference is observed on a screen placed at a distance of 100 cm from the slits. It is found that the 9th bright fringe is at a distance 8.835 mm from the second dark fringe from the centre of the fringe pattern. Find the wavelength of light used.

In the figure is shown Young’s double slit experiment. Q is the position of the first bright fringe on the right side of O. P is the 11th fringe on the other side, as measured from Q. If the wavelength of the light used is 6000xx10^-10m , then S_l B will be equal to

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

What is diffraction of light? How does it differ from interference? What are fraunhoffer and Fresnel diffractions?