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The velocity of light is maximum in:
Diamond
Water
Vacuum
Glass
Vacuum
The speed of light is inversely proportional to the refractive index of the medium through which it travels. Since a vacuum has the lowest possible refractive index of 1.0, light travels at its maximum theoretical speed, approximately 3├Ч108┬аm/s, in it.
The speed of light is inversely proportional to the refractive index of the medium through which it travels. Since a vacuum has the lowest possible refractive index of 1.0, light travels at its maximum theoretical speed, approximately 3├Ч108┬аm/s, in it.
Think of vacuum as an empty road where you can drive at maximum speed, while denser media like glass or diamond are like a crowded market where you are forced to slow down due to constant obstacles.
VAC is fast: Vacuum Always Cruises.
c=╬╝0тАЛ╧╡0тАЛтАЛ1тАЛ тАФ Speed of light in vacuum in terms of permeability and permittivity
v=ncтАЛ тАФ Relation between speed of light in a medium (v) and refractive index (n)
Light is an electromagnetic wave that requires no medium to propagate. When light travels through a material medium, it interacts with the atoms and electrons of that material, which effectively slows down the wave propagation. The ratio of the speed of light in vacuum to the speed in a medium is called the refractive index (n), defined as n=vcтАЛ.
Light is an electromagnetic wave with a constant speed in vacuum (cтЙИ299,792,458┬аm/s).
The refractive index of vacuum is exactly 1, which is the minimum value possible.
Materials with higher refractive indices slow down light more significantly.
Fiber optic communication
Measurement of astronomical distances
Refractive indices: Vacuum (1.0), Water (тЙИ1.33), Glass (тЙИ1.5), Diamond (тЙИ2.42).
Option A (Diamond) has the highest refractive index among the options, meaning it has the slowest speed of light.
C is correct тАФ Vacuum offers no physical matter to interact with light, allowing it to propagate at its maximum cosmic speed limit.
Always remember that the refractive index is inversely proportional to velocity; high density usually implies high refractive index and thus lower velocity.
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