Question

Find the ratio of intensity of two points p and q on a screen in youngs double slit

Answer 1

Answer:

Let I0 be the intensity of either of the interfering sources, the intensity I at a point P is where d is the phase difference at p between the two disturbances.

d = 00 ; I = 4Io cos2(00)

............(i)

Let I0 be the intensity of either of the interfering sources, the intensity I at a point Q is where d is the phase difference at p between the two disturbances.

d = 900 ; I = 4Io cos2(450)

..........(ii)

Dividing (i) by (ii), we get the ratio as 2:1