Question

as light travels from rare to a denser it will have velocity
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Answer 1

Answer:

ᗩᑎᔕᗯEᖇ

Rarer medium will have refractive index n2 less than refractive index n1 of denser medium. Thus, according to the law speed will increase when travelling from denser to rarer medium i.e. v2 will be greater than v1.

Explanation:

Answer 2

Answer:

when light travels from rarer to denser medium the one which travels to an angle will slow down its velocity and changes its direction

The wave which is coming at perpendicular direction to the plane normal , changes its velocity but not direction.

hope this answer will help you