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According to Cauchy's formula, the refra...

According to Cauchy's formula, the refractive index `mu` of a material is related to wavelength `lamda` as………. .

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`mu = A + (B)/(lambda^(2)) + (C )/(lambda^(4)) + ….` where `A, B,C`……….are constants.
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A beam of light of wavelength 400 nm is incident normally on a right angled prism as shown in Fig. It is observed that light just grazes along the surface AC after falling on it. If refractive index mu of the material of prism varies with wavelength lamda as mu = 1.2 + (b)/(lamda^2) Calculate the value of b and mu of prism material for lamda = 500 nm . Given theta = sin^-1 (0.625) . .

The refractive index of material varies with wavelength according to the Cauchy’s relation is

PRADEEP-OPTICS-Exercise
  1. The deviation through a prism is minimum when……….. .

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  2. In the minimum deviation position, the………. In the prism is……… to the b...

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  3. According to Cauchy's formula, the refractive index mu of a material i...

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  4. Wavelength of violet colour is……… wavelength of red colour. Therefore,...

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  5. Angular dispersion of a prism is……….of………..and……….colours.

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  6. Dispersive power of a prism is……….of……….and………. .

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  7. Intensity of scattered light varies…………………as……………..of wavelength of in...

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  8. Calculate the refractive index of the material of an equilaterial pris...

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  9. A ray of light suffers minimum deviation, while passing through a pri...

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  10. A ray of light is inclined to one face of a prism at an angle of 60^@....

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  11. A glass prism has a refracting angle of 60^@. The angle of minimum dev...

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  12. A small angled prism (mu = 1.62) gives a deviation of 4.8. Calculate t...

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  13. Show that the angle of deviation produced by a thin prism is reduced t...

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  14. The refractive index of the material of a prism of 60^(@) angle for ye...

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  15. A prism of refractive index 1.53 is placed in water of refractive inde...

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  16. A ray of light is inclined to one face of a prism at an angle of 60^@....

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  17. A glass prism has a refracting angle of 60^@. The angle of minimum dev...

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  18. The angle of minimum deviation for prism of angle pi//3 is pi//6. Calc...

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  19. A glass prism of angle 72^(@) and refractive index 1.66 is immersed in...

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  20. A prism with refracting angle 60^@ gives angle of minimum deviation, 5...

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