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When both the components of electric fie...

When both the components of electric field of light waves are present such that one is stronger than the other and such light is viewed through a rotating analyser, one sees a maximum and a minimum of intensity but not complete darkness. This kind of light is called

A

polarised

B

linearly polarised

C

partially polarised

D

None of these

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The correct Answer is:
C
In the special situation, one of the two perpendicular components of the electric field is zero. At other angles, both components are present but one is stronger than the other. There is no stable phase relationship between the two perpendicular components, since these are derived from two perpendicular components of an unpolarised beam. When such light is viewed through a rotating analyser, one sees a maximum and a minimum of intensity but not complete darkness. This kind of light is called partially polarised.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE THEORY OF LIGHT -EXERCISE 2 (Miscellaneous Problems)
  1. Which phenomenon best supports the theory that matter has a wave natur...

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  2. Which of the following cannot be polarised?

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  3. An optically active compound

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  4. If the polarizing angle of a piece of glass for green light is 54.74^(...

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  5. When unpolarised light beam is incident from air onto glass (n=1.5) at...

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  6. When both the components of electric field of light waves are present ...

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  7. In the propagation of electromagnetic waves the angle between the dire...

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  8. An unpolarised beam of intensity I(0) is incident on a pair of nicols ...

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  9. A beam of unpolarised light is passed first through tourmaline crystan...

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  10. If the plane of vibrations of the string is changed randomly in a very...

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  11. According to Newton's corpuscular theory, the speed of light is

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  12. A beam of natural light falls on a system of 5 polaroids, which are ar...

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  13. A ray of light is incident on a medium boundry at polarising angle suc...

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  14. Polarisation of light proves the -

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  15. Unpolarized light is incident on a plane glass surface. What should be...

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  16. If the string always remains confined to the xy-plane, then it represe...

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  17. Unpolarized light of intensity I(0) is incident on surface of a block ...

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  18. A polarised light intensity I(0) is passed through another polariser w...

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