# I Speed of Light and magnetic fields

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1. Dec 11, 2017

### Nicola321

If the speed of light is ~300 m/s in a vacuum, can the electric and magnetic fields of the wave be condensed such that it travels faster? The idea being that an outside force condenses these fields and lenghtens the wavelenght with no loss of energy thus increasing the directional speed. The medium would not be a vacuum but something else.

2. Dec 12, 2017

### Ibix

The speed of light is 300 million meters per second in vacuum. Its speed is invariant, and anything travelling faster than light leads to causality paradoxes. So no, you can't make light travel faster than light.

3. Dec 12, 2017

### Staff: Mentor

In a medium the speed of light is less than in a vacuum.
... which answers the question. However, the invariance of the $c$ is the origin of special relativity theory which is about all other movements.

As the answer is no and everything else is fantasy, this thread will be closed.