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Mark Gallagher asked the Naked Scientists:I am an independent observer (a disembodied entity of myself); I am watching myself in my car in space. My car, in reverse gear, can travel the speed of light. I select reverse gear and accelerate to the speed of light. I switch on my headlights. What do I see, as the observer?What do you think?
You would 'see' nothing - as time would be standing still, em waves would have NO FREQUENCY!This is the equivalent sort of question to my Grandfather's old chestnut "What happens when an irresistable force meets and immoveable object?" It is a non-real scenario so you get daft answers.