first when the light ray enters into water medium its speed is 2.25*10powr 8 if after refraction it moves away from the normal so its speed increases. hoe is this possible while travelling in water it lost its energy now how can it gain speed

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Solution

There is some error in the question when ray of the enters in the water, it bends towards the normal and its speed will decrease(rarer to denser medium).
If ray of light comes out from the water then the case proposed by you is possible.(denser to rarer medium).

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first when the light ray enters into water medium its speed is 2.25*10powr 8 if after refraction it moves away from the normal so its speed increases. hoe is this possible while travelling in water it lost its energy now how can it gain speed

There is some error in the question when ray of the enters in the water, it bends towards the normal and its speed will decrease(rarer to denser medium). If ray of light comes out from the water then the case proposed by you is possible.(denser to rarer medium).

There is some error in the question when ray of the enters in the water, it bends towards the normal and its speed will decrease(rarer to denser medium).
If ray of light comes out from the water then the case proposed by you is possible.(denser to rarer medium).