O-LevelPhysicsLight5054/11 · Oct/Nov 2010 · Q241 Mark

Which pair of emissions travels with the same speed in air?

Aalpha-particles and gamma-rays

Bgamma-rays and infra-red waves

Cinfra-red waves and sound waves

Dsound waves and alpha-particles

✓ Correct answer

B: gamma-rays and infra-red waves

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