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(i) Find the speed of light of wavelengt...

(i) Find the speed of light of wavelength `lambda`=780 nm (in air) in a medium of of refractive index µ=1.55.
(ii) What is the wave length of this light in the given medium?

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(i) Speed of light, v`=c/µ=(3.0xx10^(8))/1.55`
`=1.94xx10^(8)` m/s
(ii) Wavelength of light in the given medium,
`lamda_("medium")=(lamda_(air))/mu=780/1.55=503 nm`
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