A light beam traveling along the \(x\text-\)axis with a planar wavefront is incident on a medium of thickness \(t\). In the region, where light is falling, the refractive index can be taken to be varying such that \(\dfrac{dn}{dy}>0.\) The light beam on the other side of the medium will emerge:

1.	parallel to the \(x\text-\)axis
2.	bending downward
3.	bending upward
4.	split into two or more beams

Polarized light incident on a polaroid. Let ${\mathrm{}}_{}$\(I_{0}\) be the intensity of light transmitted by this polaroid. Now, a very large number (say \(N\)) of polaroids are placed in a row with their axes displaced through a small angle \(\theta\) successively. If the last polaroid is crossed to the first one, the intensity of light transmitted by the last polaroid is about:

In the given figure \(S_1\) and \(S_2\) are two coherent sources oscillating in phase. The total number of bright fringes and their shape as seen on the large screen will be:

In Young's double-slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case:

 Two Sources \(S_1\) and \(S_2 \) of intensity \(I_1\) and \(I_2\) are in front of a screen [Fig.(a)]. The pattern of intensity distribution seen in the central portion is given by Fig.(b).

In this case, which of the following statements are true?

Choose the correct option:

Consider sunlight incident on a pinhole of width \(10^{3}~\mathring{{A}}\). The image of the pinhole seen on a screen shall be:

Choose the correct option from the given ones:

Consider the diffraction pattern for a small pinhole. As the size of the hole is increased: