A-LevelPhysicsWaves9702/12 · May/June 2010 · Q241 Mark
Electromagnetic waves from an unknown source in space were found to be significantly diffracted when passing through gaps of the order of 10⁻⁵ m. Which type of wave are they most likely to be?
Aradio waves
Bmicrowaves
Cinfra-red waves
Dultraviolet waves
✓ Correct answer
C: infra-red waves
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