Which one of the following radiations has the strongest photon?
Correct answer: D. γ-rays
- A. T.V waves
- B. Microwaves
- C. X-rays
- D. γ-rays
Explanation
Photon energy is E = hf, so radiation with the greatest frequency has the strongest, or most energetic, photons. Gamma rays have a higher frequency than X-rays, microwaves and TV waves. Students may choose X-rays because they are also highly energetic, but gamma rays lie at the higher-frequency end of the electromagnetic spectrum.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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