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The specific rotation of an optically ac...

The specific rotation of an optically active substance of lenth l cm and concentratio c,with an optcial rotaion `theta` si

A

`(lc)/(10 theta)`

B

`(thetalc)/(10)`

C

`(10 theta)/(lc)`

D

`(10)/(theta l c)`.

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There is another useful system of units, besides the SI/MKS. A system, called the cgs system. In this system Coulumb's law is given by vecF = (Qq)/(r^2) hatr where the distance r is measured in cm (=10^(-2) m) , F in dynes (= 10^(-5) N) and the charges in electrostatic units (es units), where 1es unit of charge = 1/[3] xx 10^(-9) C . The number [3] actually arises the speed of light in vacuum which now taken to be exactly given by c = 2.99792458 xx 10^8 m/s . An approximate value of c then is c = [3] xx 10^8 m/s . Show that the Coulomb law in cgs units yields. 1 esu of charge = 1 (dy )^(1/2) cm . obtain the dimension of units of charge in terms of mass M, length L and time T. show that it is given in terms of fractional powers of M and L.

MODERN PUBLICATION-UNIT TEST -06-EXERCISE
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  2. Which of the following phenomenon shows the transverse nature of light...

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  3. The waves that cannot be polarised are:

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  4. When a polariod is rotated,the intenstiy of ligth is not found to vary...

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  5. What are plane of polarisation and plane of vibration?

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  6. In the propagation of ligth waves,the ngle between the direction of pr...

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  7. When the light is incident at the polarising angle ,which of the follo...

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  8. A ray of light is incident on a medium at polarising angle .What is th...

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  9. What is the polarising anle of a medium of refractive index sqrt3?

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  10. The expression relating polarising angle nad refrractive indes is

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  11. If the speed of light and the polarising angle for a given medium are ...

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  12. Suppose P is polarising angle for a transparent medium an the speed of...

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  13. A ray of light is incident on a medium at polarising angle .What is th...

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  14. Which of the following materials may be used to produce polaroids?

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  15. The property of rotating the plane of polarisation is known as

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  16. When a polaroid is rotated,the intesntiy of light varies and correspon...

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  17. When a polaroid is rotated,the intensity of light varies but never red...

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  18. The specific rotation of an optically active substance of lenth l cm a...

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  19. A decimetre length of solution with concentratin 500 kg m^(-3) rotate...

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  20. The specific rotation of a liquid of lenth 10 cm,concentration 2 g cm^...

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