Question

how to learn rarer and denser mefium​

Answer 1

Answer:

rarer medium is small(halka)but denser medium is heavy

Answer 2

Explanation:

In rarer medium the refracted ray moves away from normal whereas in denser medium it comes towards the normal.

its just like when we get a strict teacher, we move away from her whereas when we have a friendly one , we usually get attracted towards her