WAEC Physics 2018 Objective — Question 20
Question 20 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.
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Which of the following electromagnetic waves is most energetic?
- A. Radio waves
- B. X-rays
- C. Gamma raysCorrect
- D. Ultra-violet rays
Explanation
Gamma rays have the shortest wavelength and highest frequency of the options, so they carry the most energy (E=hf).
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