speed
Refraction occurs when light travels from one medium to another having different optical densities.
Refraction is the change in direction of a wave when it reaches a boundary between two media due to traveling at different speeds in each medium.
amplitude
When a toy car travels from a plain floor to the grass lawn we see that it deflects.Similarly light too bends when it changes its medium.This bending can be seen at the boundary of the two mediums that separates them.
Refraction
Refraction occurs when light travels from one medium to another having different optical densities.
When light enters a different medium, the amount that the light is bent as it enters the medium is determined by the medium's index of refraction.
Refraction occurs because waves move at different speeds in different bodies. Because a wave hits the other medium at an angle, part of the wave changes speed earlier than the rest, turning the waves. this is most obvious with light waves in water, but it happens with all types of waves in any change of medium.
Refraction is the change in direction of a wave when it reaches a boundary between two media due to traveling at different speeds in each medium.
amplitude
refraction occurs if the medium is water. or it bounces of a solid,my guess :D
Refraction occurs when a beam of light is bent, and is caused by a change in the speed of the beam as it passes from one transparent medium to another. Refraction is the basis for vision and for optical lenses, which focus light rays into a new image. It also creates rainbows when individual color frequencies are split from white light.
Refraction occurs for any waves, where there's a change in the medium.
When a toy car travels from a plain floor to the grass lawn we see that it deflects.Similarly light too bends when it changes its medium.This bending can be seen at the boundary of the two mediums that separates them.
Cameras do not refract light, lenses do. Refraction occurs whenever light passes from one medium to another, so it is not something that only occurs with lenses.
Refraction
It seems that you have not got a hold on refraction yet. Refraction occurs when a light is moving from one kind of medium to another kind. Now the slower the light moves more is the refraction. In fact refraction occurs due to change in the velocity of light in different mediums. When light moves from a rarer medium to a denser medium like say from air to glass, The speed of light decreases and the light moves towards the normal. A part of the light gets reflected back into the air as it falls on a denser medium. The reflection you see in the mirror is not perfect as due to the thickness of the glass most of the light refracts and some reflects.