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They die.
Refraction
The light rays will refract towards the normal of the medium and emerge out at the same angle.
the pupil =]
when light rays enter a new medium in a new angle it may speed up or speed down
they are absorbed
they are asorbed.
Pupil
pupil
An opaque medium.
what happens is that lenses bend light in a way that makes an image
The, light rays reflect depending on the curature of the concave.