In an interference of light derived from two slit apertures, if at some point on the screen, yellow light has a path difference of `(3lamda)/2`, then the fringe at

Answer the following: (a) In Young's double slit experiment, the two slits are illuminated by two different lamps having same wavelength of light. Explain with reason, whether interference pattern will be observed on the screen or not. (b) Light waves from two coherent sources arrive at two points on a screen with path differences of 0 and lamda//2 . Find the ratio of intensities at the points.

(a) In Young's double slit experiment, the two slits are illuminated by two different lamps having same wavelength of light. Explain with reason, whether interference pattern will be observed on the screen or not. (b) Light waves waves from two coherent sources arrive at two points on a screen with path differences of 0 and lamda//2 . Find the ratio of intensities at the points.

A : Light from two coherent sources is reaching the screen. If the path difference at a point on the screen for yellow light is 3lambda"/"2 , then the fringe at the point will be coloured. R : Two coherent sources always have same phase relationship at any point on the screen.

Assertion (A) : Light from two coherent sources is reaching the screen. If the path difference at a point on the screen for yellow light is 3 lambda//2 , then the fringe at the point will be coloured. Reason (R ) : Two coherent sources always have constant phase relationship

Light from two coherent sources is reaching the screen. If the path difference at a point on the screen for the yellow light be (3lambda)/2 , then what will be the colour of the fringe at that point?