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Question

State whether true or false : 
Light travels faster in glass than in air.


A
True
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B
False
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Solution

The correct option is B False
False. 
we know that speed of light in any medium  is $$v=\dfrac{c}{\eta}$$.
Where c is the speed of light in vacuum and $$\eta$$ is refractive index of medium . Refractive index of glass is higher than of air, so light will travel faster in air. 

Physics

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