Tyre grip of aeroplane details and mechanism What is the source of energy of acceleration of light travelling from denser to lighter medium?

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Satish Narula

In the question Tyre grip of aeroplane details and mechanism may be treated as withdrawn ,It was erroneously copied

Gerhard Martens

There is not need of a source of energy. The energy of the photon remains constant when passing the border of material having different index of refraction.

As I have mentioned in some former answers of your questions:

the photon does not behave like a tennis ball.

Thanks