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Polarization of light Exercise

1. Show that light waves are transverse in nature.


2. Define plane of vibration and plane of polarisation.


3. Explain, light can be polarised by reflection.


4. Write note on Malus Law.


5. Explain Double reflection.


6. Give Huygen’s explanation to show that light can be polarised by double refraction.


7. Write note on Nicol’s Prism.


8. Explain, how a Nicol prism can be used as polariser and analyser.


9. Give theory of production of circular and elliptical polarised light.


10. Explain quarter and half wave-plate.


11. Explain optical rotation and give Fresnel’s theory of optical rotation.


12. What do you understand by a half. and quarter wave-plate? Give the theory and construction of Laurent’s half shade polarimeter.


13. What is double refraction? How Nicol prism polarises and analyses the light?


14. What do you understand by optical rotation? Explain Fresnel’s theory of the rotation of the

plane of polarization. How would you increase the sensitivity of a pair of crossed Nicols?


15. Define specific rotation. Describe the construction and working of a Laurent’s half shade

polarimeter. Explain fully the action of the half shade device. How would you use it to determine

the specific rotation of sugar solution?


16. Describe a Nicol prism and show how it can be used for the study of polarization of light. Explain how you can distinguish between different kinds of polarized light and also a mixture of natural and plane polarized light. Describe the instrument you would use for the purpose.


17. Describe the construction and working of a Nicol Prism to generate plane polarised light. what is the difference between ordinary ray and extraordinary ray?


18. What do you understand by

(i) plane polarised light                    (ii) circularly polarised light

(iii) elliptically polarised light ? How would you experimentally differentiate between them ?