How Does the Envelope of a Light Wavepacket Change at a Media Interface?

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SUMMARY

The envelope of a light wavepacket experiences a change when crossing the interface between two media. While the electric field of the wavepacket remains continuous across the boundary, the magnetic field (B field) does not maintain continuity. This indicates that the envelope's characteristics can be affected by the differing properties of the two media, leading to potential alterations in its shape and propagation speed.

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harvey_dog
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Hi, I've had trouble finding an answer to this question and was wondering if anyone could help.

What happens to the envelope of a wavepacket of light when it crosses the interface between two media?

I know that the field of the wavepacket will be continuous across the boundary, but does the same apply to the envelope?
 
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The B field is not continuous.
 

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