Polarization of Light Multiple Choice Questions and Answers

21. If the light is made incident on any transparent medium at the polarizing angle, the reflected light is

1. unpolarised
2. Plane polarised
3. partially Polarised
4. none of these

22. If the light is made incident on any transparent medium at the polarizing angle, the transmitted light is

1. unpolarised
2. Plane polarised
3. partially Polarised
4. none of these

23. In a semiconductor laser, the doping concentration is so high that the Fermi level in N type diode lies

1. Center of energy gap
2. Top of valence band
3. Bottom of conduction band
4. Inside the conduction band

24. In double refraction, the vibrations of E ray are confined in

1. Plane perpendicular to the principle section
2. Principle section
3. at an angle ? to the principle section
4. keeps on changing orientation

25. In optics, when the vibrations of light are limited to a single two dimensional plane, it is said that light has been what?

1. Polarised
2. Plane polarised
3. Partially polarised
4. Unpolarised

26. In the population inversion

1. The number of electrons in higher energy state is more than ground state
2. The number of electrons in lower energy state is more than higher energy state
3. The number of electrons in lower energy state and higher energy state are same
4. None of them

27. Laser beam is made a of

1. Electrons
2. Highly coherent photon
3. Elastic particles
4. Excited atoms

28. LASER is a short form of

1. Light Amplification by Spontaneous Emission of Radiation.
2. Light Amplification by Stimulated Emission of Radiation.
3. Light Absorption by Stimulated Emission of Radiation.
4. Light Absorption by Spontaneous Emission of Radiation.

29. Laser radiation is

1. Monochromatic
2. Directed in a narrow beam
3. Produced with large power densities
4. All of the above

30. O and E waves travel with the same velocity...............in the crystal

1. parallel to the surface
2. Perpendicular to the surface
3. along optic axis
4. none of the above