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a. The refractive index is glass is 1.5....

a. The refractive index is glass is 1.5. What is the speed of light in glasss? (Speed of light invacuum is `3.0xx10^(8)ms^(-1)`)
b. Is the speed of light inglass independent of he colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

Text Solution

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Refractive index mu=`"speed of light in vaccum"/"speed of light in medium"`
`mu=(c)/(nu)=(3xx10^(8))/(nu)`
`:.nu=(3xx10^(8))/(1.5)=2xx10^(8)ms^(-1)`
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