why water is optically denser than air
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Water is optically denser as you know liquid itself is a denser state than gas.. now optically the molecules of water are closely packed which make the ray of light entering water bend towards normal the change in angle that is angle of incidence - angle of refraction is large when light enters from vacuum into water.. whereas in case of air it is negligible…
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Refractive index water is 4/3 =1.33
Refractive index of air is nearly equal to one.
So speed of light is less in water , because refractive index of any medium is inversely proportional to speed of light in that medium.
We know that speed of light is low in denser medium when compared with rarer medium.
Therefore water acts as optically denser than air
Refractive index of air is nearly equal to one.
So speed of light is less in water , because refractive index of any medium is inversely proportional to speed of light in that medium.
We know that speed of light is low in denser medium when compared with rarer medium.
Therefore water acts as optically denser than air
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