how a light ray doesn’t slow down after hitting an object and bouncing off it.

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how a light ray doesn’t slow down after hitting an object and bouncing off it.

In: Physics

The speed of light depends only on the stuff it’s moving through – air, water, nothing. A photon does lose energy when it’s reflected, but it doesn’t lose speed. A photon moving through empty space always moves at 300,000 kilometres per second. If it’s reflected, it gets redder (longer wavelength) but not slower.

Really short, rudimentary answer; Light does not have mass, so it isn’t effected by physics in the same way we expect other things to be.