10.3 (a) **The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 * 108 m s–1)

(b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?**

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Payal Gupta | Contributor-Level 10

9 months ago

10.3 The refractive index of glass, $?$ = 1.5

Speed of light in vacuum, c = 3.0 $* 10^{8}$ m/s

Speed of light in glass is given by the relation, $v$ = $\frac{c}{?}$ = $\frac{3.0 * 10^{8}}{1.5}$ = 2 $* 10^{8}$ m/s

The speed of light in glass is not independent of the colours of light. The refractive index of a violet component of white light is less than the speed

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10.3 (a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 * 108 m s–1) (b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?