122
Question
Que. (A) The refractive index of glass is 1.5. What is the speed of light in glass? ( speed of light in vacuum is 3.0×108ms−1)
(B) Is the speed of light in glass independent to the colour of light? Which of the two Colour red and violet travels slower in glass prism?
(B) Is the speed of light in glass independent to the colour of light? Which of the two Colour red and violet travels slower in glass prism?
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Solution
The relation between redfractive index and speed is as follows
n=cv where c is the velocity of light and v is the velocity of light in glass.
So,
1.5=3×108v
v=2×108m/s
The relation between redfractive index and speed is as follows
n=cv where c is the velocity of light and v is the velocity of light in glass.
So,
1.5=3×108v
v=2×108m/s
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