Question

From Brewster�s law, except for polished metallic surfaces, the polarising angle

• A. depends on wavelength and is different for different colours
• B. independent of wavelength and is different for different colours
• C. independent of wavelength and is same for different colours
• D. depends on wavelength and is same for different colours

Answer 1

Answer: (A)

depends on wavelength and is different for different colours

Answer 2

From Brewsters laws $i_p = tan^{-1}(\mu)$
i.e., the polarising angle depends on refractive index and hence on wavelength and therefore is different for different colours.