JAMB Physics 2023 Objective — Question 15

Question 15 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2023 Objective paper, with the correct answer and a full explanation.

The diagram illustrates an EM wave travelling at 3×10⁸ m/s. Calculate the frequency of the wave.

• A. 1.5×10⁹ HzCorrect
• B. 1.5×10⁷ Hz
• C. 5.0×10⁸ Hz
• D. 10⁹ Hz

Explanation

3 wavelengths span 0.6 m → λ=0.2 m; f=3×10⁸/0.2=1.5×10⁹ Hz.

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