Question

A girl standing at point P on a beach wishes to reach a point Q in the sea as quickly as possible. She can run at 6kmh−1 on the beach and swim at 4kmh−1 in the sea. She should take the path

1)PAQ
2)PBQ
3)PCQ
4)PDQ

Answer 1

Answer:

The answer will be option 3 PCQ

Explanation:

According to snell's law the light taken the path by which it can the reach the destination in less time.

Therefore for any object while going from one point to another maintain this law.

Therefore for this problem we know that velocity will be decreased by going inside the sea , therefore the girl will choose the beach way to reach to the destination .

Answer 2

Answer:

We know that while going from one point to the other light rays opt the path for which it will take the least time covering the distance between two points.

Taking this fact into consideration smell

law was derived

So, for any object to take a path of minimum time while going from one point to the other it will have to follow snell's law

Therefore applying snell's law here we find that velocity is decreasing when we cross beach and goes inside the sea.

So, for this situation where light is travelling from optically rarer to denser medium it will take the path PCQ

Explanation:

please make me as Brainliest