Which one of the following radiations possesses maximum velocity ?
Correct answer: C. γ-rays
- A. α-rays
- B. β-rays
- C. γ-rays
- D. All of above have the same speed
Explanation
Gamma rays are electromagnetic radiation and travel at approximately 3.0 x 10^8 m/s in vacuum, whereas alpha particles are much slower and beta particles have speeds below this limit. The likely mistake is choosing all of the above because all radiation can be very fast, but their speeds are not equal.
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About Radioactive Decay
Radioactive decay is the spontaneous transformation of unstable nuclei, described by decay constant, activity, half life and the exponential decay law. Work includes alpha, beta and gamma emissions, decay equations and remaining nuclei, with half life distinguished from the time required for complete decay.
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