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Physics (AS & A Level) · Feb / March 2025 · Paper 12 · Question 23

9702Electromagnetic spectrum

What is the approximate range of wavelengths in free space for infrared radiation?

  1. A100 nm to 400 nm
  2. B300 µm to 30 cm
  3. C400 nm to 700 nm
  4. D800 nm to 1000 µm

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Correct answer: D. 800 nm to 1000 µm

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