Which of the following technologies work at 5 GHz? (Multiple choice)

Question

Options

• ARadar
• BBluetooth
• CInfrared
• DDigital Satellite

• A
  74% (17)
• B
  9% (2)
• C
  17% (4)

Explanation

Radar operates in the C-band range (~5 GHz), and digital satellite uplinks (C-band) also transmit around 5.925–6.425 GHz, placing both firmly in the 5 GHz range. Bluetooth is the most common distractor - it operates at 2.4 GHz, not 5 GHz, sharing that band with older Wi-Fi and microwave ovens. Infrared is not a radio frequency technology at all; it uses light waves (just below visible light on the spectrum), making frequency comparisons like "5 GHz" irrelevant to it.

Memory tip: Think "Radar and Satellite Soar High" - both reach the 5 GHz+ range, while Bluetooth stays low at 2.4 GHz, and Infrared isn't even in the radio frequency game.

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