Two polaroids are placed at `90^@` to each and the transmitted intensity is zero. What happens when one of them is rotated?

Two polaroids are placed at 90^@ to each other and the transmitted intensity is zero .What happens,when one more polaroid is placed betwen these two,bisectiing the angle between them.How will the intensity of transmitted light vary on further rotatint the third polaroid?

Two polarised are placed at 90^@ to each other and the intensity of transmitted light is zero. What will be the intensity of transmitted light, when one or more polaroids is placed between these two bisecting the angle between them? Take intensity of unpolarised light as I_0 ?

Two polaroids are placed at 90^@ to each other.What happens,when(N-1) more polaroids are inserted between them?Their axis are equally spaced.How does the trnsitted intensity behave ffor large N?

Two point electric charges of unknown magnitude and sign are placed at a distance 'd' apart. The electric intensity is zero at a point, not between the charges but on the line joining them. Write two essential conditions for this to happen.

Two point electric charges of unknown magnitude and sign are placed a distance apart. The electric field intensity is zero at a point not between the charges but on the line joining them. Write two essential conditions for this to happen.

What happens when H2 and O2 react with each other?

What happens to the interference pattern,when one of the slits is closed?

Two polaroids are aligned,so that the intentsity of light emerging out of them is maximum.Through what angle one of them should be rotated ,so that the intensity of light emerging out of them is reduced to half.

If a polaroid is kept in the path of a uniformly unpolarised light ,the intensity of the transmitted light to the intensity of the light ,when the polaroid is not kept in its path,is