Some kind of lens or a change in a substance: the surface of a pond, through a prism, through glass... all of these may refract light.
Light refracts when it passes from one medium into another one with a differentrefractive index.If transparent objects didn't refract light, then eyeglasses wouldn't work.
Assuming you're talking about transparent substances... It bends (refracts). The amount depends on the difference between the refractive index of each substance.
when a light ray passes from one medium to another at an angle
the light bends
Light does not bend as it passes through a material. It bends when it passes from one material to another. This is called refraction. Light can also be dispersed, that is separated into its different colours, if it is refracted enough.
it refracts
Light refracts when it passes from one medium into another one with a differentrefractive index.If transparent objects didn't refract light, then eyeglasses wouldn't work.
Assuming you're talking about transparent substances... It bends (refracts). The amount depends on the difference between the refractive index of each substance.
when a light ray passes from one medium to another at an angle
the light bends
Light does not bend as it passes through a material. It bends when it passes from one material to another. This is called refraction. Light can also be dispersed, that is separated into its different colours, if it is refracted enough.
You observe the light falling from another direction
Its being Refracted.
No
It does. The light refracts when it enters one side of the glass, and then it refracts in the other direction when it leaves the other side and goes back into air. The slab of glass doesn't distort the image, because its surfaces are flat and parallel. So light leaves the glass in very nearly the same direction as it was headed when it arrived.
No,its called refraction. this actually happens when the light passes from one medium to another and thus the velocity of light changes, which enable the light to bend.
There will be refraction when light passes from one substance to the other (for example, from air to water), when the two substances have different indices of refraction, and when light passes the surface at an angle. In other cases, there is no refraction.