Question

a ray of light travel from rarer to denser medium. how will it bend?​

Answer 1

Answer:

When light travels from a denser medium to a rarer medium, it bends away from the normal, as illustrated to the left. This behavior follows from Snell's Law. As you saw before, the larger angle must be in the medium having the lower index of refraction. On the previous pages, that was medium 1, but here it is medium 2.

Answer 2

Answer:

Ray of light will bend towards the normal.

Because the speed of light decrease when it travel rarer to denser medium and vice versa.