Question

explain deeply about rarer and denser​

Answer 1

Your question is incomplete.....

But if u are asking about rarer and denser medium...then I can give u examples.

Rarer medium example-Air

Denser medium example-Water

As the light moves from rarer medium to denser medium,its speed decreases.

Rarer medium has has less optical density compared to that of denser medium...


Also,light ray moves away from the normal in rarer medium whereas light moves towards the normal in denser medium
I hope this was helpful..

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Answer 2

rarer medium= when the ray will bend away from normal for example.. a ray of light passing from water to air
denser medium= when a ray of light bend towards the normal. for example.. a ray of light passing from air to water

water = denser (molecules r close to each other)
air = rarer (molecules r far)