Two coherent point source `S_(1)` and `S_(2)` vibrating in phase emit light of wavelength `lambda`. The separation between them is `2 lambda` as shown in figure. The first bright fringe is formed at 'P' due to interference on a screen placed at distance 'D' from `S_(1)(Dgtgtlambda)`, then OP is

1) `sqrt(3)D , 2) 1.5D , 3) sqrt(2)D , 4) 2D`

Two coherent point sources S_1 and S_2 vibrating in phase emit light of wavelength lamda . The separation between them is 2lamda . The light is collected on a screen placed at a distance Dgt gt lamda from the slit S_1 as shown. The minimum distance, so that intensity at P is equal to the intensity at O

Two coherent point sources S_(1) and S_(2) vibrating in phase emit light of wavelength lambda . The separation between the sources is 2lambda . Consider a line passing through S_(1) and perpendicular to line S_(1) S_(2) . Find the position of farthest and nearest minima. .

Two identical light sources S_1 and S_2 emit light of same wavelength lambda . These light rays will exhibit interference if

Two coherent point sources S_1 and S_2 are separated by a small distance d as shown. The fringes obtained on the screen will be

Consider the situation shown in figure-6.35. The two slits S_(1) and S_(2) placed symmetrically around the central line are illuminated by a monochromatic light of wavelength lambda . The separation between the slits is d. The light transmitted by the slits falls on a screen E_(1) placed at a distance D from the slits. The slit S_(3) is at the central line and the slit S_(4) is at a distance z from S_(3) . Another screen E_(2) is placed a further distance D away from E_(1) . Find the ratio of the maximum to minimum intensity observed on E_(2) if z is equal is : (a) (lambdaD)/(2d) " "(b) (lambdaD)/(d)" " (c )(lambdaD)/(4d)

Consider the situation shown in fig. The two slits S_(1) and S_(2) placed symmetrically around the central line are illuminated by monochromatic light of wavelength lambda . The separation between the slit is d. The ligth transmitted by the slits falls on a screen S_(0) placed at a distance D form the slits. The slit S_(3) is at the central line and the slit S_(4) is at a distance z from S_(3) Another screen S_(c) is placed a further distance D away from S_(c) Find the ratio of the maximum to minimum intensity observed on S_(c) If z = (lambda D)/(2 d)

Two monochromatic coherent point sources S_(1) and S_(2) are separated by a distance L. Each sources emits light of wavelength lambda , where L gt gt lambda . The line S_(1) S_(2) when extended meets a screen perpendicular to it at point A. Then