the speed of light it different when it is passed through air, water or glass because all these have different optical densities. Speed of light is fastest in air, slower in water and slowest in glass.
The speed of light in a vacuum is constant, however water, glass and even air will slow the speed of light down.
The formula v=c/n should be used, where n is the refractive index of the medium (for a vacuum n=1). As glass has a higher refractive index (around 1.5 depending on what its made of) the light will slow down as it goes from water into glass
If a beam of light from air passes through a glass or a water then the speed of light decreases because of denser nature of water or glass and because of high refractive index of water or glass
With the information included in the question, the only thing you can say is
that the speed changes. You can't tell whether it becomes faster or slower
than it was, until you know what medium it occupied before it entered the
water or the glass.
Speed of light through a medium depends on the density of the medium. Speed of light is directly proportional to the density of medium. Air is less dense than glass. So, when light goes into air from glass, the speed of light increases . The angle which the ray makes to the normal increases.
Its slows slightly as it hits the water, at the same time it also bends.
It isn't: the speed of light is the speed of light. However, light does travel slower when passing through matter than it does when light passes through a vacuum.
It slows down from approx 225,408,000 m/s to approx 203,940,000 m/s.
At that boundary, the speed increases.
They'll leave your car at the speed of light, and when that light passes anybody, they'll measure the speed of the light as it passes them to be the speed of light.
It moves at a slower speed!
That depends what it comes out of. If it passes into air from vacuum, thenits speed decreases. If it passes into air from water or jello, then its speedincreases.
It decreases.
Nothing happens to it. The speed of light is constant as long as it stays in the oil, and although it changes as it crosses the boundary from one to the other, it stays constant again once it's in the glass.
The speed decreases.
They'll leave your car at the speed of light, and when that light passes anybody, they'll measure the speed of the light as it passes them to be the speed of light.
It moves at a slower speed!
speed of light will decreases
It increases.
it travels at c (speed of light in a vacuum)
Light speed slows down in the glass.
That depends what it comes out of. If it passes into air from vacuum, thenits speed decreases. If it passes into air from water or jello, then its speedincreases.
It decreases.
Its speed and wavelength change.
Light travels slower in glass based on its refractive index of 1.5.
It's either absorbed, reflected or refracted by the material, or any combination of the three. Refraction happens in transparent materials like glass, the speed and possibly direction of the light may be altered. Light travelling through glass, water or diamond for example, will travel slightly slower.