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    Undergrad How fast must an infrared remote approach for its light to appear red?

    What happens if an infrared remote control is pointing and coming at your eye really fast while transmitting... would the frequency of the em waves increase? If so, how fast would it need to be traveling in order to appear red?
    • genq
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    • Controls Infrared Light
    • Replies: 3
    • Forum: Optics
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