Calculate the ratio in which the line joining A(6, 5) and B(4, -3) is divided by the line y = 2.In Young's double slit experiment, the source S and two slits A and B are lying in a horizontal plane. The slit A is above slit B. The fringe are obtained on a vertical screen K. The optical path from S to B is increased by putting a transparent material of higher refractive indices. The path from S to A remains unchanged. As a result of this, the result fringe pattern moves some what?
a. upwards
b. downwards
c. towards left horizontally
d. towards right horizontally