If we move with the speed of light and hold a mirror in our hand with proper length. Will we be able to see ourself?


At the moment you reach the speed of light, time for you will stop completely. This means you will freeze within one instance, as a result, you won't be able to see yourself.
If you travel just below the speed of light, say 99.999% the speed of light, and hold a mirror in front of you, then you would be able to see yourself.

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