Which of the following electromagnetic waves possesses the highest frequency and photon energy in the electromagnetic spectrum?
Answer and explanation
Correct answer: C. Gamma rays
- Step 1: Recall the electromagnetic spectrum in order of increasing frequency and photon energy (): Radio < Microwave < Infrared < Visible < UV < X-ray < Gamma rays.
- Step 2: Gamma rays occupy the highest frequency end with frequencies exceeding and highest photon energies.
Answer
Gamma rays.
Why not the others: 'X-rays' have lower frequencies than gamma rays; 'Ultraviolet rays' have lower frequencies than X-rays; 'Microwaves' are long-wavelength, low-energy waves.
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