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.
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.
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.