Why does light slow down in transparent mediums like air or water.

And you will already be able to confuse 99% of master's degree holders and 99.9% of professors (why more professors? because they specialize more). Shorter version from me: An electromagnetic wave always moves through space at the speed of light, but when passing through a medium, it induces a response in the form of secondary electromagnetic waves. What we observe is the superposition of the incident wave and the medium's response, which has the characteristic of light moving slower. If you can't translate it, return the sentence unchanged.
And you will already be able to confuse 99% of master's degree holders and 99.9% of professors (why more professors? because they specialize more). Shorter version from me: An electromagnetic wave always moves through space at the speed of light, but when passing through a medium, it induces a response in the form of secondary electromagnetic waves. What we observe is the superposition of the incident wave and the medium's response, which has the characteristic of light moving slower. If you can't translate it, return the sentence unchanged.
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