Question

The absolute refractive index of two media A'
and 'B' are 2.0 and 1.5 respectively. If the
speed of light in medium 'B' is 2X10^8m/s,
Calculate the speed of light in
(1) Vaccum 2) medium 'A'.

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Answer 1

Answer:

speed of light =speed in vacuum/refractive index

2x10^8=speed in vacuum of light/1.5

speed in vacuum of light=3x10^8m/s

now

speed in medium A=speed in vacuum/refractive index

=3x10^8/2=1.5x10^8m/s

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