State one condition for obtaining a sustained interference of light.

State two conditions to obtain sustained interference of light. In young's double slit experiment, using light of wavelength 400 nm, interference fringes of width X are obtained. The wavelength of light is increased to 600 nm and the separation between the slits is halved. if one wants the observed fringe width on the screen to be the same in the two cases, find the ratio of the distance between the screen and the plane of the slits in the two arrangements.

During interference of light

Define interference. List the conditions of obtaining sustained interference.

List the conditions necessary for sustained interference.

Diffraction and interference of light refers to -

Diffraction and interference of light refers to -

State two necessary conditions for hearing a distance echo.

State the importance of coherent sources in the phenomenon of interference. In Young's double slit expet-ment to produce interference pattern obtain the conditions for constructive and destructive interference. Hence deduce the expression for the fringe width. How does the firinge width get affected, if the entire experimental apparatus of Young's is immersed in water ?

State the necessary conditions for the interference of two sound waves.

State the conditions required for total internal reflection of light to take place.