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Question
3.(C) How does the velocity of light vary with change in the optical density of the media?
3.(C) How does the velocity of light vary with change in the optical density of the media?
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Solution
When we drive on a road without much congestion we can easily drive faster if required. But in a congested road we are bound to drive slower than normal speed.
In a similar fashion light moves slower when the medium is ‘Optically Denser’ and it moves faster in an ‘Optically Rarer’ medium.
So we can say when light moves from optically denser medium to optically rarer medium, its speed rises. As a result it moves away from the normal and gets closer to the separating surface.
On the contrary, when light moves from optically rarer to optically denser medium, its speed falls. As a result, it moves towards the normal.
Hope this helps :)
When we drive on a road without much congestion we can easily drive faster if required. But in a congested road we are bound to drive slower than normal speed.
In a similar fashion light moves slower when the medium is ‘Optically Denser’ and it moves faster in an ‘Optically Rarer’ medium.
So we can say when light moves from optically denser medium to optically rarer medium, its speed rises. As a result it moves away from the normal and gets closer to the separating surface.
On the contrary, when light moves from optically rarer to optically denser medium, its speed falls. As a result, it moves towards the normal.
Hope this helps :)
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