List of top Questions asked in UPSEE- 2009

Which of the following will increase with the increase in temperature ?

A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is

A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and the latter is equal to $ \frac{3}{4} $ the angle of prism. The angle of deviation is