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Refractive index of glass w.r.t water is...

Refractive index of glass w.r.t water is `9//8`. What is the speed of light in water ? Given speed pf light in glass is `2 xx 10^(8) m//s`.

A

`1.25xx10^(8)m//s `

B

`1.5xx10^(8) m//s `

C

`1.75xx10^(8) m//s `

D

`2.25xx10^(8) m//s `

Text Solution

Verified by Experts

The correct Answer is:
D
`""_(w) n_g =(9)/(8)=(V_(w))/(V_(g))`
`:. V_w=(9)/(8) xx V_g= 9/8 xx 2 xx 10^(8) 2.25 xx 10^8 m//s `
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