Answer:
second medium is less optical denser than first medium
Step-by-step explanation:
As per Snell's law we know that

so here we know that
= angle of incidence
= angle of refraction
As we know that light ray goes away from the normal when it move from medium 1 to medium 2
so here angle of refraction will me more than the angle of incidence
so we have

since we know that

so we have


so we can say that

so we can say that second medium is less optical denser than first medium