What wavelength do we report receiving

Reference no: EM13995362

An unidentified flying object (UFO) streaks across the sky at a speed of .999 c relative to the earth. A person on earth determines the length of the UFO to be 3m in its direction of motion. What length does it have when it lands at SeaTac and the LGMs(little green men) pop out to say "Greetings Earthlings"! These LGMs use a common red laser to signal to other ships and space stations. At rest the laser light wavelength is 633nm. As they are coming at their full speed towards earth they send a laser signal to us. What wavelength do we report receiving?

Reference no: EM13995362

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