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# Does Light Slow Down In Water

Does Light Slow Down In Water. The first statement is the backbone of all of modern physics (relativity), and the second helps explain things like diffraction and rainbows. For some materials such as water, light will slow down more than electrons will.

The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one.*. Similarly to cloudy day, when it takes much longer for atmosphere to get warm, as light does not reach as much as in a clear day. Thus, an electron in water can travel faster than light.

### He Lists A Few Wrong Explanations And Then Shows You The Real Reason This.

* this was discovered by jean foucault in 1850. 2) light slows down when it passes through a medium (like water, glass, air,.). As rhe density increases of the medium, light finds it difficult to pass, hence slows down.

### The First Statement Is The Backbone Of All Of Modern Physics (Relativity), And The Second Helps Explain Things Like Diffraction And Rainbows.

In vacuum light travels at 300,000 km's /sec, in water 225 k/sec, and in glass 200 k/sec. The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one.*. Similarly to cloudy day, when it takes much longer for atmosphere to get warm, as light does not reach as much as in a clear day.

### When People Talk About The Speed Of Light In A General Context, They Usually Mean The Speed Of Light In A.

Don lincoln takes on the mystery of why light travels slower in water and glass.