Test Preparation on CSIR Test Prep For Physical Science Paper-2
1.
If E2 = E1, the tip of the electric field vector will describe a trajectory that, as viewed along the z-axis from positive z and looking toward the origin, is a
2.
If the plane wave is split and recombined on a screen after the two portions, which are polarized in the x- andy-directions, have traveled an optical path difference of 21tlk, the observed average intensity will be proportional to
3.
A light source is at the bottom of a pool of water (the index of refraction of water is 1.33). At what minimum angle of incidence will a ray be totally reflected at the surface?
4.
Consider a single-slit diffraction pattern for a slit of width d. It is observed that for light of wave length 400 nanometers, the angle between the first mini? mum and the central maximum is 4 x 10-3 radians. The value of d is
5.
A collimated laser beam emerging from a commer? cial ReNe laser has a diameter of about 1 milli? meter. In order to convert this beam into a well? collimated beam of diameter 10 millimeters, two convex lenses are to be used. The first lens is of focal length 1.5 centimeters and is to be mounted at the output of the laser. What is the focal length, f, of the second lens and how far from the first lens should it be placed?
6.
The approximate number of photons in a femto? second (10-15s)pu}se Of 600 nanometers WaVe? length light from a 10-kilowatt peak-power dye laser is
