When light moves from one medium to anot...

When light moves from one medium to another
(i) the frequency of light remains same and wavelength changes
(ii) refractive index of a medium is the ratio of speed of light in vacuum and speed of light in medium
(iii) refractive index of a medium is the ratio of wavelength of light in vacuum and wavelength in medium
(iv) for denser medium, the value of refractive index is larger

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