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Q: Which of the following types of light carries a signal from a television remote to the device it controls?
  • A. Polarised
  • B. Ultraviolet
  • C. Infrared
  • D. X-ray
Correct Answer: Option C - To send a signal to a television, remote controls often use a diode that emits light at around 940 in wavelength, which falls into the range of near-infrared light.
C. To send a signal to a television, remote controls often use a diode that emits light at around 940 in wavelength, which falls into the range of near-infrared light.

Explanations:

To send a signal to a television, remote controls often use a diode that emits light at around 940 in wavelength, which falls into the range of near-infrared light.