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If a car runs at the speed of light, will the headlights work?

Best Answers

Would the light from the headlights travel twice the speed of light? No. Like waves on a lake, the speed of the light is unaffected by boats and fast cars. However, the driver of the car will experience something really interesting… nothing. read more

So my answer is this: A car travelling at the speed of light is impossible, but a car travelling just below the speed of light is merely nonsensical, and in that case you would see the light from the headlights receding away from you at the speed of light. read more

Within your car you observe no unusual effects. You can look at yourself in your mirror which is moving with the car and you will look the same as usual. Looking out of the window is a different matter. The light from your headlights will always go at the speed of light in your reference frame. read more

As you approach the speed of light with your headlights on, however, you would still measure the light beam racing away from your car at 186,000 miles per second (c). read more

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