A light beam propagates two times slower when it passes from medium-1 to medium-2. If the wavelength in medium-1 is A1= 750 nm, and the index of refraction in medium-2 is n2= 2.8, then the frequency of light is: (Take speed of light in vacuum c 3 x 10^8 m/s) O f- 0.71 x 10^14 Hz O f- 0.47 x 10 14 Hz O f= 2.86 x 10^14 Hz O f-4.28 x 10^14 Hz Of-1.43 x 10 14 Hz

A light beam propagates two times slower when it passes from medium-1 to medium-2. If the wavelength in medium-1 is A1= 750 nm, and the index of refraction in medium-2 is n2= 2.8, then the frequency of light is: (Take speed of light in vacuum c 3 x 10^8 m/s) O f- 0.71 x 10^14 Hz O f- 0.47 x 10 14 Hz O f= 2.86 x 10^14 Hz O f-4.28 x 10^14 Hz Of-1.43 x 10 14 Hz

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