Ratio waves originating from sources `S_(1)` and `S_(2)` having zero phase difference and common wavelength `lambda` will show completely destructive interference at a point `P` is `S_(1)P-S_(2)P` is

In the case of light waves from two coherent sources S_(1) and S_(2) , there will be constructive interference at an arbitrary point P, the path difference S_(1)P - S_(2)P is

In the case of light waves from two coherent sources S_(1) and S_(2) , there will be constructive interference at an arbitrary point P, the path difference S_(1)P - S_(2)P is

In experimental set up of interference the twol interfering sources S_(1) and S_(2) have an initial phase difference corresponding to a path difference of lambda//4 . The phase difference due to path difference between the twoll interfering waves at a point of constructive and destructive interference respectively is

At two points P and Q on a screen in Young's double slit experiment, waves from slits S_(1) and S_(2) have a path difference of O and (lambda)/(4) respectively. The ratio of intensities at P and Q will be ......

At two point P and Q on screen in Young's double slit experiment, waves from slits S_(1) and S_(2) have a path difference of 2lamda and (lamda)/(4) respectively. The ratio of intensities at P and Q will be:

The coherent point sources S_(1) and S_(2) vibrating in same phase emit light of wavelength lambda . The separation between the sources is 2lambda . Consider a line passing through S_(2) and perpendicular to the line S_(1)S_(2) . What is the smallest distance from S_(2) where a minimum of intensity occurs due to interference of waves from the two sources?