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DuskyDay t1_j8iio35 wrote on February 14, 2023 at 3:50 PM

Reply to comment by leftoutoctopus in Light traveling through a medium that slows it. Does the same photon emerge? by TheGandPTurtle

This can't be understood without math.

The wave doesn't lose energy as long as the crystal lattice is perfect, because the physics of our universe allows it to spread in a special way. (The photons don't interact with the particles the medium is made of.)