4.(b) The refractive index of E-ray and o-ray are respectively 1.65 and 1.45. Then find the thickness of the material required to make a quarter wave plate for light of wavelength 5000 .
4.(b) The refractive index of E-ray and o-ray are respectively 1.65 and 1.45. Then find the thickness of the material required to make a quarter wave plate for light of wavelength 5000 .
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