WAEC Physics 2021 Objective — Question 29
Question 29 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.
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29. Which of the following arrangements of radiations below shows decreasing order of wavelengths?
- A. X-rays > radio waves > infrared radiations
- B. Radio waves > infrared radiations > X-raysCorrect
- C. Infrared radiations > radio waves > X-rays
- D. X-rays > infrared radiations > radio waves
Explanation
In the electromagnetic spectrum, radio waves have the longest wavelength, followed by infrared, then X-rays with the shortest.
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