I was thinking today about the speed of light and how it is supposed to be unbreakable for anything with mass..

However I came up with this scenerio and wonder if it is possible...

I have managed to invent a gun that can fire projectiles at 250 000km/s..I have also invented a train that travels at 150 000km/s...

Now whilst the train is travelling at top speed I fire the gun in the direction the train is travelling....Now relative to me on the train the projectile is now travelling at 250 000km/s BUT relative to an observer who is watching the train go past he sees the projectile travelling at 350 000km/s and in fact is going faster than the speed of light..

Does that sound correct???

However I came up with this scenerio and wonder if it is possible...

I have managed to invent a gun that can fire projectiles at 250 000km/s..I have also invented a train that travels at 150 000km/s...

Now whilst the train is travelling at top speed I fire the gun in the direction the train is travelling....Now relative to me on the train the projectile is now travelling at 250 000km/s BUT relative to an observer who is watching the train go past he sees the projectile travelling at 350 000km/s and in fact is going faster than the speed of light..

Does that sound correct???

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