Source Placed Beyond The Central Line

Beyond Birth

In Fresnel’s biprism experiment, which of the following light sources used to locate central fringe :

Two point sources are placed on a straight line separated by a distance d = 3 lambda . Both the sources are placed at a distance L from a wall which is perpendicular to the straight line. Both the sources are sending waves of equal intensity. Find: a. Locus of the points on the wall having equal intensity. b. Maximum and minimun path difference observed on the wall.

The two coherent sources of monochromatic light of wavelength lambda are located at a separation lambda . The two sources are placed on a horizontal line and screen is placed perpendicular to the line joining the sources. Find position of the farthest minima from the centre of the sources.

In an interference experiment, the two slits S_(1) and S_(2) are not equidistant from the source S. then the central fringe at 0 will be

Beyond The Worldly Pleasures

Beyond The Worldly Pleasures

Which one of the following is NOT the source of revenue of Central Government ?