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Monochromatic light of wavelength 6000 o...

Monochromatic light of wavelength `6000 overset@ (A)` travels through a glass of refractive index `frac(3)(2)`. The distance travelled by the light in 1 picosecond is

A

`100 mum`

B

`200 mum`

C

`300 mum`

D

`400 mum`

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